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16da134b | 1 | #include "cache.h" |
1c41d280 | 2 | #include "argv-array.h" |
33028713 | 3 | #include "repository.h" |
b2141fc1 | 4 | #include "config.h" |
f8a9d428 | 5 | #include "dir.h" |
16da134b JS |
6 | #include "tree.h" |
7 | #include "tree-walk.h" | |
076b0adc | 8 | #include "cache-tree.h" |
16da134b | 9 | #include "unpack-trees.h" |
96a02f8f | 10 | #include "progress.h" |
0cf73755 | 11 | #include "refs.h" |
06f33c17 | 12 | #include "attr.h" |
5fc2fc8f | 13 | #include "split-index.h" |
a7bc845a SB |
14 | #include "submodule.h" |
15 | #include "submodule-config.h" | |
883e248b | 16 | #include "fsmonitor.h" |
cbd53a21 | 17 | #include "object-store.h" |
b14ed5ad | 18 | #include "promisor-remote.h" |
16da134b | 19 | |
8ccba008 JH |
20 | /* |
21 | * Error messages expected by scripts out of plumbing commands such as | |
22 | * read-tree. Non-scripted Porcelain is not required to use these messages | |
23 | * and in fact are encouraged to reword them to better suit their particular | |
23cbf11b | 24 | * situation better. See how "git checkout" and "git merge" replaces |
dc1166e6 | 25 | * them using setup_unpack_trees_porcelain(), for example. |
8ccba008 | 26 | */ |
6271d77c | 27 | static const char *unpack_plumbing_errors[NB_UNPACK_TREES_WARNING_TYPES] = { |
08353ebb | 28 | /* ERROR_WOULD_OVERWRITE */ |
8ccba008 JH |
29 | "Entry '%s' would be overwritten by merge. Cannot merge.", |
30 | ||
08353ebb | 31 | /* ERROR_NOT_UPTODATE_FILE */ |
8ccba008 JH |
32 | "Entry '%s' not uptodate. Cannot merge.", |
33 | ||
08353ebb | 34 | /* ERROR_NOT_UPTODATE_DIR */ |
8ccba008 JH |
35 | "Updating '%s' would lose untracked files in it", |
36 | ||
08402b04 MM |
37 | /* ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN */ |
38 | "Untracked working tree file '%s' would be overwritten by merge.", | |
8ccba008 | 39 | |
08402b04 MM |
40 | /* ERROR_WOULD_LOSE_UNTRACKED_REMOVED */ |
41 | "Untracked working tree file '%s' would be removed by merge.", | |
8ccba008 | 42 | |
08353ebb | 43 | /* ERROR_BIND_OVERLAP */ |
8ccba008 | 44 | "Entry '%s' overlaps with '%s'. Cannot bind.", |
e800ec9d | 45 | |
cd002c15 EN |
46 | /* ERROR_WOULD_LOSE_SUBMODULE */ |
47 | "Submodule '%s' cannot checkout new HEAD.", | |
e800ec9d | 48 | |
6271d77c EN |
49 | /* NB_UNPACK_TREES_ERROR_TYPES; just a meta value */ |
50 | "", | |
08402b04 | 51 | |
1ac83f42 | 52 | /* WARNING_SPARSE_NOT_UPTODATE_FILE */ |
22ab0b37 | 53 | "Path '%s' not uptodate; will not remove from working tree.", |
a7bc845a | 54 | |
ebb568b9 EN |
55 | /* WARNING_SPARSE_UNMERGED_FILE */ |
56 | "Path '%s' unmerged; will not remove from working tree.", | |
57 | ||
1ac83f42 | 58 | /* WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN */ |
22ab0b37 | 59 | "Path '%s' already present; will not overwrite with sparse update.", |
8ccba008 JH |
60 | }; |
61 | ||
08353ebb MM |
62 | #define ERRORMSG(o,type) \ |
63 | ( ((o) && (o)->msgs[(type)]) \ | |
64 | ? ((o)->msgs[(type)]) \ | |
65 | : (unpack_plumbing_errors[(type)]) ) | |
8ccba008 | 66 | |
3d415425 SB |
67 | static const char *super_prefixed(const char *path) |
68 | { | |
69 | /* | |
70 | * It is necessary and sufficient to have two static buffers | |
71 | * here, as the return value of this function is fed to | |
72 | * error() using the unpack_*_errors[] templates we see above. | |
73 | */ | |
74 | static struct strbuf buf[2] = {STRBUF_INIT, STRBUF_INIT}; | |
75 | static int super_prefix_len = -1; | |
76 | static unsigned idx = ARRAY_SIZE(buf) - 1; | |
77 | ||
78 | if (super_prefix_len < 0) { | |
79 | const char *super_prefix = get_super_prefix(); | |
80 | if (!super_prefix) { | |
81 | super_prefix_len = 0; | |
82 | } else { | |
83 | int i; | |
84 | for (i = 0; i < ARRAY_SIZE(buf); i++) | |
85 | strbuf_addstr(&buf[i], super_prefix); | |
86 | super_prefix_len = buf[0].len; | |
87 | } | |
88 | } | |
89 | ||
90 | if (!super_prefix_len) | |
91 | return path; | |
92 | ||
93 | if (++idx >= ARRAY_SIZE(buf)) | |
94 | idx = 0; | |
95 | ||
96 | strbuf_setlen(&buf[idx], super_prefix_len); | |
97 | strbuf_addstr(&buf[idx], path); | |
98 | ||
99 | return buf[idx].buf; | |
100 | } | |
101 | ||
e294030f MM |
102 | void setup_unpack_trees_porcelain(struct unpack_trees_options *opts, |
103 | const char *cmd) | |
dc1166e6 | 104 | { |
7980872d | 105 | int i; |
e294030f | 106 | const char **msgs = opts->msgs; |
dc1166e6 | 107 | const char *msg; |
fa3f60b7 | 108 | |
1c41d280 MÅ |
109 | argv_array_init(&opts->msgs_to_free); |
110 | ||
2e3926b9 VA |
111 | if (!strcmp(cmd, "checkout")) |
112 | msg = advice_commit_before_merge | |
113 | ? _("Your local changes to the following files would be overwritten by checkout:\n%%s" | |
c2691e2a | 114 | "Please commit your changes or stash them before you switch branches.") |
2e3926b9 VA |
115 | : _("Your local changes to the following files would be overwritten by checkout:\n%%s"); |
116 | else if (!strcmp(cmd, "merge")) | |
117 | msg = advice_commit_before_merge | |
118 | ? _("Your local changes to the following files would be overwritten by merge:\n%%s" | |
c2691e2a | 119 | "Please commit your changes or stash them before you merge.") |
2e3926b9 | 120 | : _("Your local changes to the following files would be overwritten by merge:\n%%s"); |
dc1166e6 | 121 | else |
2e3926b9 VA |
122 | msg = advice_commit_before_merge |
123 | ? _("Your local changes to the following files would be overwritten by %s:\n%%s" | |
c2691e2a | 124 | "Please commit your changes or stash them before you %s.") |
2e3926b9 | 125 | : _("Your local changes to the following files would be overwritten by %s:\n%%s"); |
fa3f60b7 | 126 | msgs[ERROR_WOULD_OVERWRITE] = msgs[ERROR_NOT_UPTODATE_FILE] = |
1c41d280 | 127 | argv_array_pushf(&opts->msgs_to_free, msg, cmd, cmd); |
dc1166e6 MM |
128 | |
129 | msgs[ERROR_NOT_UPTODATE_DIR] = | |
584f99c8 | 130 | _("Updating the following directories would lose untracked files in them:\n%s"); |
dc1166e6 | 131 | |
2e3926b9 VA |
132 | if (!strcmp(cmd, "checkout")) |
133 | msg = advice_commit_before_merge | |
134 | ? _("The following untracked working tree files would be removed by checkout:\n%%s" | |
c2691e2a | 135 | "Please move or remove them before you switch branches.") |
2e3926b9 VA |
136 | : _("The following untracked working tree files would be removed by checkout:\n%%s"); |
137 | else if (!strcmp(cmd, "merge")) | |
138 | msg = advice_commit_before_merge | |
139 | ? _("The following untracked working tree files would be removed by merge:\n%%s" | |
c2691e2a | 140 | "Please move or remove them before you merge.") |
2e3926b9 | 141 | : _("The following untracked working tree files would be removed by merge:\n%%s"); |
dc1166e6 | 142 | else |
2e3926b9 VA |
143 | msg = advice_commit_before_merge |
144 | ? _("The following untracked working tree files would be removed by %s:\n%%s" | |
c2691e2a | 145 | "Please move or remove them before you %s.") |
2e3926b9 | 146 | : _("The following untracked working tree files would be removed by %s:\n%%s"); |
1c41d280 MÅ |
147 | msgs[ERROR_WOULD_LOSE_UNTRACKED_REMOVED] = |
148 | argv_array_pushf(&opts->msgs_to_free, msg, cmd, cmd); | |
2e3926b9 VA |
149 | |
150 | if (!strcmp(cmd, "checkout")) | |
151 | msg = advice_commit_before_merge | |
152 | ? _("The following untracked working tree files would be overwritten by checkout:\n%%s" | |
c2691e2a | 153 | "Please move or remove them before you switch branches.") |
2e3926b9 VA |
154 | : _("The following untracked working tree files would be overwritten by checkout:\n%%s"); |
155 | else if (!strcmp(cmd, "merge")) | |
156 | msg = advice_commit_before_merge | |
157 | ? _("The following untracked working tree files would be overwritten by merge:\n%%s" | |
c2691e2a | 158 | "Please move or remove them before you merge.") |
2e3926b9 VA |
159 | : _("The following untracked working tree files would be overwritten by merge:\n%%s"); |
160 | else | |
161 | msg = advice_commit_before_merge | |
162 | ? _("The following untracked working tree files would be overwritten by %s:\n%%s" | |
c2691e2a | 163 | "Please move or remove them before you %s.") |
2e3926b9 | 164 | : _("The following untracked working tree files would be overwritten by %s:\n%%s"); |
1c41d280 MÅ |
165 | msgs[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN] = |
166 | argv_array_pushf(&opts->msgs_to_free, msg, cmd, cmd); | |
dc1166e6 MM |
167 | |
168 | /* | |
169 | * Special case: ERROR_BIND_OVERLAP refers to a pair of paths, we | |
170 | * cannot easily display it as a list. | |
171 | */ | |
ed47fdf7 | 172 | msgs[ERROR_BIND_OVERLAP] = _("Entry '%s' overlaps with '%s'. Cannot bind."); |
dc1166e6 | 173 | |
a7bc845a | 174 | msgs[ERROR_WOULD_LOSE_SUBMODULE] = |
6362ed0b | 175 | _("Cannot update submodule:\n%s"); |
5e65ee35 | 176 | |
1ac83f42 | 177 | msgs[WARNING_SPARSE_NOT_UPTODATE_FILE] = |
22ab0b37 | 178 | _("The following paths are not up to date and were left despite sparse patterns:\n%s"); |
ebb568b9 EN |
179 | msgs[WARNING_SPARSE_UNMERGED_FILE] = |
180 | _("The following paths are unmerged and were left despite sparse patterns:\n%s"); | |
1ac83f42 | 181 | msgs[WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN] = |
22ab0b37 | 182 | _("The following paths were already present and thus not updated despite sparse patterns:\n%s"); |
5e65ee35 MM |
183 | |
184 | opts->show_all_errors = 1; | |
7980872d CB |
185 | /* rejected paths may not have a static buffer */ |
186 | for (i = 0; i < ARRAY_SIZE(opts->unpack_rejects); i++) | |
187 | opts->unpack_rejects[i].strdup_strings = 1; | |
dc1166e6 MM |
188 | } |
189 | ||
1c41d280 MÅ |
190 | void clear_unpack_trees_porcelain(struct unpack_trees_options *opts) |
191 | { | |
192 | argv_array_clear(&opts->msgs_to_free); | |
193 | memset(opts->msgs, 0, sizeof(opts->msgs)); | |
194 | } | |
195 | ||
46169180 | 196 | static int do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce, |
6ff264ee | 197 | unsigned int set, unsigned int clear) |
b48d5a05 | 198 | { |
419a597f | 199 | clear |= CE_HASHED; |
34110cd4 | 200 | |
700e66d6 NTND |
201 | if (set & CE_REMOVE) |
202 | set |= CE_WT_REMOVE; | |
203 | ||
6ff264ee | 204 | ce->ce_flags = (ce->ce_flags & ~clear) | set; |
46169180 JK |
205 | return add_index_entry(&o->result, ce, |
206 | ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); | |
6ff264ee RS |
207 | } |
208 | ||
a33bd4d3 RS |
209 | static void add_entry(struct unpack_trees_options *o, |
210 | const struct cache_entry *ce, | |
211 | unsigned int set, unsigned int clear) | |
212 | { | |
8e72d675 | 213 | do_add_entry(o, dup_cache_entry(ce, &o->result), set, clear); |
b48d5a05 LT |
214 | } |
215 | ||
e6c111b4 MM |
216 | /* |
217 | * add error messages on path <path> | |
218 | * corresponding to the type <e> with the message <msg> | |
219 | * indicating if it should be display in porcelain or not | |
220 | */ | |
221 | static int add_rejected_path(struct unpack_trees_options *o, | |
222 | enum unpack_trees_error_types e, | |
223 | const char *path) | |
224 | { | |
b165fac8 | 225 | if (o->quiet) |
191e9d2c NTND |
226 | return -1; |
227 | ||
e6c111b4 | 228 | if (!o->show_all_errors) |
3d415425 | 229 | return error(ERRORMSG(o, e), super_prefixed(path)); |
e6c111b4 MM |
230 | |
231 | /* | |
232 | * Otherwise, insert in a list for future display by | |
6271d77c | 233 | * display_(error|warning)_msgs() |
e6c111b4 | 234 | */ |
7980872d | 235 | string_list_append(&o->unpack_rejects[e], path); |
e6c111b4 MM |
236 | return -1; |
237 | } | |
238 | ||
e6c111b4 MM |
239 | /* |
240 | * display all the error messages stored in a nice way | |
241 | */ | |
242 | static void display_error_msgs(struct unpack_trees_options *o) | |
243 | { | |
6271d77c EN |
244 | int e; |
245 | unsigned error_displayed = 0; | |
e6c111b4 | 246 | for (e = 0; e < NB_UNPACK_TREES_ERROR_TYPES; e++) { |
7980872d | 247 | struct string_list *rejects = &o->unpack_rejects[e]; |
6271d77c | 248 | |
7980872d | 249 | if (rejects->nr > 0) { |
6271d77c | 250 | int i; |
e6c111b4 | 251 | struct strbuf path = STRBUF_INIT; |
6271d77c EN |
252 | |
253 | error_displayed = 1; | |
7980872d CB |
254 | for (i = 0; i < rejects->nr; i++) |
255 | strbuf_addf(&path, "\t%s\n", rejects->items[i].string); | |
3d415425 | 256 | error(ERRORMSG(o, e), super_prefixed(path.buf)); |
e6c111b4 | 257 | strbuf_release(&path); |
e6c111b4 | 258 | } |
7980872d | 259 | string_list_clear(rejects, 0); |
e6c111b4 | 260 | } |
6271d77c | 261 | if (error_displayed) |
ed47fdf7 | 262 | fprintf(stderr, _("Aborting\n")); |
e6c111b4 MM |
263 | } |
264 | ||
6271d77c EN |
265 | /* |
266 | * display all the warning messages stored in a nice way | |
267 | */ | |
268 | static void display_warning_msgs(struct unpack_trees_options *o) | |
269 | { | |
270 | int e; | |
271 | unsigned warning_displayed = 0; | |
272 | for (e = NB_UNPACK_TREES_ERROR_TYPES + 1; | |
273 | e < NB_UNPACK_TREES_WARNING_TYPES; e++) { | |
274 | struct string_list *rejects = &o->unpack_rejects[e]; | |
275 | ||
276 | if (rejects->nr > 0) { | |
277 | int i; | |
278 | struct strbuf path = STRBUF_INIT; | |
279 | ||
280 | warning_displayed = 1; | |
281 | for (i = 0; i < rejects->nr; i++) | |
282 | strbuf_addf(&path, "\t%s\n", rejects->items[i].string); | |
283 | warning(ERRORMSG(o, e), super_prefixed(path.buf)); | |
284 | strbuf_release(&path); | |
285 | } | |
286 | string_list_clear(rejects, 0); | |
287 | } | |
288 | if (warning_displayed) | |
289 | fprintf(stderr, _("After fixing the above paths, you may want to run `git sparse-checkout reapply`.\n")); | |
290 | } | |
a7bc845a SB |
291 | static int check_submodule_move_head(const struct cache_entry *ce, |
292 | const char *old_id, | |
293 | const char *new_id, | |
294 | struct unpack_trees_options *o) | |
295 | { | |
cd279e2e | 296 | unsigned flags = SUBMODULE_MOVE_HEAD_DRY_RUN; |
a7bc845a | 297 | const struct submodule *sub = submodule_from_ce(ce); |
7463e2ec | 298 | |
a7bc845a SB |
299 | if (!sub) |
300 | return 0; | |
301 | ||
cd279e2e SB |
302 | if (o->reset) |
303 | flags |= SUBMODULE_MOVE_HEAD_FORCE; | |
304 | ||
7463e2ec | 305 | if (submodule_move_head(ce->name, old_id, new_id, flags)) |
191e9d2c | 306 | return add_rejected_path(o, ERROR_WOULD_LOSE_SUBMODULE, ce->name); |
7463e2ec | 307 | return 0; |
a7bc845a SB |
308 | } |
309 | ||
33028713 | 310 | /* |
15beaaa3 | 311 | * Perform the loading of the repository's gitmodules file. This function is |
33028713 | 312 | * used by 'check_update()' to perform loading of the gitmodules file in two |
15beaaa3 | 313 | * different situations: |
33028713 BW |
314 | * (1) before removing entries from the working tree if the gitmodules file has |
315 | * been marked for removal. This situation is specified by 'state' == NULL. | |
316 | * (2) before checking out entries to the working tree if the gitmodules file | |
317 | * has been marked for update. This situation is specified by 'state' != NULL. | |
318 | */ | |
319 | static void load_gitmodules_file(struct index_state *index, | |
320 | struct checkout *state) | |
a7bc845a | 321 | { |
33028713 BW |
322 | int pos = index_name_pos(index, GITMODULES_FILE, strlen(GITMODULES_FILE)); |
323 | ||
324 | if (pos >= 0) { | |
325 | struct cache_entry *ce = index->cache[pos]; | |
326 | if (!state && ce->ce_flags & CE_WT_REMOVE) { | |
d7992421 | 327 | repo_read_gitmodules(the_repository, 0); |
33028713 | 328 | } else if (state && (ce->ce_flags & CE_UPDATE)) { |
f793b895 | 329 | submodule_free(the_repository); |
0f086e6d | 330 | checkout_entry(ce, state, NULL, NULL); |
d7992421 | 331 | repo_read_gitmodules(the_repository, 0); |
a7bc845a SB |
332 | } |
333 | } | |
334 | } | |
335 | ||
384f1a16 | 336 | static struct progress *get_progress(struct unpack_trees_options *o) |
16da134b | 337 | { |
96a02f8f | 338 | unsigned cnt = 0, total = 0; |
384f1a16 SB |
339 | struct index_state *index = &o->result; |
340 | ||
341 | if (!o->update || !o->verbose_update) | |
342 | return NULL; | |
343 | ||
344 | for (; cnt < index->cache_nr; cnt++) { | |
345 | const struct cache_entry *ce = index->cache[cnt]; | |
346 | if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE)) | |
347 | total++; | |
348 | } | |
349 | ||
328c6cb8 | 350 | return start_delayed_progress(_("Updating files"), total); |
384f1a16 SB |
351 | } |
352 | ||
b878579a NTND |
353 | static void setup_collided_checkout_detection(struct checkout *state, |
354 | struct index_state *index) | |
355 | { | |
356 | int i; | |
357 | ||
358 | state->clone = 1; | |
359 | for (i = 0; i < index->cache_nr; i++) | |
360 | index->cache[i]->ce_flags &= ~CE_MATCHED; | |
361 | } | |
362 | ||
363 | static void report_collided_checkout(struct index_state *index) | |
364 | { | |
365 | struct string_list list = STRING_LIST_INIT_NODUP; | |
366 | int i; | |
367 | ||
368 | for (i = 0; i < index->cache_nr; i++) { | |
369 | struct cache_entry *ce = index->cache[i]; | |
370 | ||
371 | if (!(ce->ce_flags & CE_MATCHED)) | |
372 | continue; | |
373 | ||
374 | string_list_append(&list, ce->name); | |
375 | ce->ce_flags &= ~CE_MATCHED; | |
376 | } | |
377 | ||
378 | list.cmp = fspathcmp; | |
379 | string_list_sort(&list); | |
380 | ||
381 | if (list.nr) { | |
382 | warning(_("the following paths have collided (e.g. case-sensitive paths\n" | |
383 | "on a case-insensitive filesystem) and only one from the same\n" | |
384 | "colliding group is in the working tree:\n")); | |
385 | ||
386 | for (i = 0; i < list.nr; i++) | |
387 | fprintf(stderr, " '%s'\n", list.items[i].string); | |
388 | } | |
389 | ||
390 | string_list_clear(&list, 0); | |
391 | } | |
392 | ||
b0a5a12a EN |
393 | static int check_updates(struct unpack_trees_options *o, |
394 | struct index_state *index) | |
384f1a16 SB |
395 | { |
396 | unsigned cnt = 0; | |
30ac275b | 397 | int errs = 0; |
07f967ad | 398 | struct progress *progress; |
30ac275b | 399 | struct checkout state = CHECKOUT_INIT; |
33ecf7eb | 400 | int i; |
16da134b | 401 | |
0d1ed596 | 402 | trace_performance_enter(); |
30ac275b SB |
403 | state.force = 1; |
404 | state.quiet = 1; | |
405 | state.refresh_cache = 1; | |
406 | state.istate = index; | |
13e7ed6a | 407 | clone_checkout_metadata(&state.meta, &o->meta, NULL); |
16da134b | 408 | |
26f924d5 EN |
409 | if (!o->update || o->dry_run) { |
410 | remove_marked_cache_entries(index, 0); | |
411 | trace_performance_leave("check_updates"); | |
412 | return 0; | |
413 | } | |
414 | ||
b878579a NTND |
415 | if (o->clone) |
416 | setup_collided_checkout_detection(&state, index); | |
417 | ||
384f1a16 | 418 | progress = get_progress(o); |
16da134b | 419 | |
26f924d5 | 420 | git_attr_set_direction(GIT_ATTR_CHECKOUT); |
33028713 | 421 | |
26f924d5 | 422 | if (should_update_submodules()) |
33028713 BW |
423 | load_gitmodules_file(index, NULL); |
424 | ||
34110cd4 | 425 | for (i = 0; i < index->cache_nr; i++) { |
9c5e6c80 | 426 | const struct cache_entry *ce = index->cache[i]; |
16da134b | 427 | |
e663db2f NTND |
428 | if (ce->ce_flags & CE_WT_REMOVE) { |
429 | display_progress(progress, ++cnt); | |
26f924d5 | 430 | unlink_entry(ce); |
e663db2f | 431 | } |
1fa6ead4 | 432 | } |
26f924d5 | 433 | |
6fdc2057 | 434 | remove_marked_cache_entries(index, 0); |
78478927 | 435 | remove_scheduled_dirs(); |
1fa6ead4 | 436 | |
26f924d5 | 437 | if (should_update_submodules()) |
33028713 | 438 | load_gitmodules_file(index, &state); |
a7bc845a | 439 | |
2841e8f8 | 440 | enable_delayed_checkout(&state); |
26f924d5 | 441 | if (has_promisor_remote()) { |
c0c578b3 JT |
442 | /* |
443 | * Prefetch the objects that are to be checked out in the loop | |
444 | * below. | |
445 | */ | |
446 | struct oid_array to_fetch = OID_ARRAY_INIT; | |
c0c578b3 JT |
447 | for (i = 0; i < index->cache_nr; i++) { |
448 | struct cache_entry *ce = index->cache[i]; | |
0f4a4fb1 JT |
449 | |
450 | if (!(ce->ce_flags & CE_UPDATE) || | |
451 | S_ISGITLINK(ce->ce_mode)) | |
452 | continue; | |
453 | if (!oid_object_info_extended(the_repository, &ce->oid, | |
454 | NULL, | |
455 | OBJECT_INFO_FOR_PREFETCH)) | |
456 | continue; | |
457 | oid_array_append(&to_fetch, &ce->oid); | |
c0c578b3 | 458 | } |
db7ed741 JT |
459 | promisor_remote_get_direct(the_repository, |
460 | to_fetch.oid, to_fetch.nr); | |
9f242a13 | 461 | oid_array_clear(&to_fetch); |
c0c578b3 | 462 | } |
1fa6ead4 LT |
463 | for (i = 0; i < index->cache_nr; i++) { |
464 | struct cache_entry *ce = index->cache[i]; | |
465 | ||
7a51ed66 | 466 | if (ce->ce_flags & CE_UPDATE) { |
7d782416 | 467 | if (ce->ce_flags & CE_WT_REMOVE) |
033abf97 | 468 | BUG("both update and delete flags are set on %s", |
7d782416 | 469 | ce->name); |
1fa6ead4 | 470 | display_progress(progress, ++cnt); |
7a51ed66 | 471 | ce->ce_flags &= ~CE_UPDATE; |
26f924d5 | 472 | errs |= checkout_entry(ce, &state, NULL, NULL); |
16da134b JS |
473 | } |
474 | } | |
4d4fcc54 | 475 | stop_progress(&progress); |
0f086e6d | 476 | errs |= finish_delayed_checkout(&state, NULL); |
26f924d5 | 477 | git_attr_set_direction(GIT_ATTR_CHECKIN); |
b878579a NTND |
478 | |
479 | if (o->clone) | |
480 | report_collided_checkout(index); | |
481 | ||
0d1ed596 | 482 | trace_performance_leave("check_updates"); |
c4758d3c | 483 | return errs != 0; |
16da134b JS |
484 | } |
485 | ||
eb9ae4b5 RS |
486 | static int verify_uptodate_sparse(const struct cache_entry *ce, |
487 | struct unpack_trees_options *o); | |
488 | static int verify_absent_sparse(const struct cache_entry *ce, | |
489 | enum unpack_trees_error_types, | |
490 | struct unpack_trees_options *o); | |
e800ec9d | 491 | |
a5c446f1 NTND |
492 | static int apply_sparse_checkout(struct index_state *istate, |
493 | struct cache_entry *ce, | |
494 | struct unpack_trees_options *o) | |
e800ec9d NTND |
495 | { |
496 | int was_skip_worktree = ce_skip_worktree(ce); | |
497 | ||
2431afbf | 498 | if (ce->ce_flags & CE_NEW_SKIP_WORKTREE) |
e800ec9d NTND |
499 | ce->ce_flags |= CE_SKIP_WORKTREE; |
500 | else | |
501 | ce->ce_flags &= ~CE_SKIP_WORKTREE; | |
078a58e8 NTND |
502 | if (was_skip_worktree != ce_skip_worktree(ce)) { |
503 | ce->ce_flags |= CE_UPDATE_IN_BASE; | |
883e248b | 504 | mark_fsmonitor_invalid(istate, ce); |
a5c446f1 | 505 | istate->cache_changed |= CE_ENTRY_CHANGED; |
078a58e8 | 506 | } |
e800ec9d NTND |
507 | |
508 | /* | |
eec3fc03 NTND |
509 | * if (!was_skip_worktree && !ce_skip_worktree()) { |
510 | * This is perfectly normal. Move on; | |
511 | * } | |
e800ec9d | 512 | */ |
eec3fc03 NTND |
513 | |
514 | /* | |
515 | * Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout | |
516 | * area as a result of ce_skip_worktree() shortcuts in | |
700e66d6 NTND |
517 | * verify_absent() and verify_uptodate(). |
518 | * Make sure they don't modify worktree if they are already | |
519 | * outside checkout area | |
eec3fc03 | 520 | */ |
700e66d6 NTND |
521 | if (was_skip_worktree && ce_skip_worktree(ce)) { |
522 | ce->ce_flags &= ~CE_UPDATE; | |
523 | ||
524 | /* | |
525 | * By default, when CE_REMOVE is on, CE_WT_REMOVE is also | |
526 | * on to get that file removed from both index and worktree. | |
527 | * If that file is already outside worktree area, don't | |
528 | * bother remove it. | |
529 | */ | |
530 | if (ce->ce_flags & CE_REMOVE) | |
531 | ce->ce_flags &= ~CE_WT_REMOVE; | |
532 | } | |
e800ec9d NTND |
533 | |
534 | if (!was_skip_worktree && ce_skip_worktree(ce)) { | |
535 | /* | |
536 | * If CE_UPDATE is set, verify_uptodate() must be called already | |
537 | * also stat info may have lost after merged_entry() so calling | |
538 | * verify_uptodate() again may fail | |
539 | */ | |
3cc7c504 EN |
540 | if (!(ce->ce_flags & CE_UPDATE) && |
541 | verify_uptodate_sparse(ce, o)) { | |
542 | ce->ce_flags &= ~CE_SKIP_WORKTREE; | |
e800ec9d | 543 | return -1; |
3cc7c504 | 544 | } |
e800ec9d | 545 | ce->ce_flags |= CE_WT_REMOVE; |
7d782416 | 546 | ce->ce_flags &= ~CE_UPDATE; |
e800ec9d NTND |
547 | } |
548 | if (was_skip_worktree && !ce_skip_worktree(ce)) { | |
1ac83f42 | 549 | if (verify_absent_sparse(ce, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN, o)) |
e800ec9d NTND |
550 | return -1; |
551 | ce->ce_flags |= CE_UPDATE; | |
552 | } | |
553 | return 0; | |
554 | } | |
555 | ||
ebb568b9 EN |
556 | static int warn_conflicted_path(struct index_state *istate, |
557 | int i, | |
558 | struct unpack_trees_options *o) | |
559 | { | |
560 | char *conflicting_path = istate->cache[i]->name; | |
561 | int count = 0; | |
562 | ||
563 | add_rejected_path(o, WARNING_SPARSE_UNMERGED_FILE, conflicting_path); | |
564 | ||
565 | /* Find out how many higher stage entries at same path */ | |
566 | while (++count < istate->cache_nr && | |
567 | !strcmp(conflicting_path, | |
568 | istate->cache[i+count]->name)) | |
569 | /* do nothing */; | |
570 | return count; | |
571 | } | |
572 | ||
5828e835 RS |
573 | static inline int call_unpack_fn(const struct cache_entry * const *src, |
574 | struct unpack_trees_options *o) | |
01904572 | 575 | { |
34110cd4 LT |
576 | int ret = o->fn(src, o); |
577 | if (ret > 0) | |
01904572 | 578 | ret = 0; |
01904572 LT |
579 | return ret; |
580 | } | |
581 | ||
da165f47 JH |
582 | static void mark_ce_used(struct cache_entry *ce, struct unpack_trees_options *o) |
583 | { | |
584 | ce->ce_flags |= CE_UNPACKED; | |
585 | ||
586 | if (o->cache_bottom < o->src_index->cache_nr && | |
587 | o->src_index->cache[o->cache_bottom] == ce) { | |
588 | int bottom = o->cache_bottom; | |
589 | while (bottom < o->src_index->cache_nr && | |
590 | o->src_index->cache[bottom]->ce_flags & CE_UNPACKED) | |
591 | bottom++; | |
592 | o->cache_bottom = bottom; | |
593 | } | |
594 | } | |
595 | ||
596 | static void mark_all_ce_unused(struct index_state *index) | |
597 | { | |
598 | int i; | |
599 | for (i = 0; i < index->cache_nr; i++) | |
2431afbf | 600 | index->cache[i]->ce_flags &= ~(CE_UNPACKED | CE_ADDED | CE_NEW_SKIP_WORKTREE); |
da165f47 JH |
601 | } |
602 | ||
eb9ae4b5 | 603 | static int locate_in_src_index(const struct cache_entry *ce, |
da165f47 JH |
604 | struct unpack_trees_options *o) |
605 | { | |
606 | struct index_state *index = o->src_index; | |
607 | int len = ce_namelen(ce); | |
608 | int pos = index_name_pos(index, ce->name, len); | |
609 | if (pos < 0) | |
610 | pos = -1 - pos; | |
611 | return pos; | |
612 | } | |
613 | ||
614 | /* | |
615 | * We call unpack_index_entry() with an unmerged cache entry | |
616 | * only in diff-index, and it wants a single callback. Skip | |
617 | * the other unmerged entry with the same name. | |
618 | */ | |
619 | static void mark_ce_used_same_name(struct cache_entry *ce, | |
620 | struct unpack_trees_options *o) | |
621 | { | |
622 | struct index_state *index = o->src_index; | |
623 | int len = ce_namelen(ce); | |
624 | int pos; | |
625 | ||
626 | for (pos = locate_in_src_index(ce, o); pos < index->cache_nr; pos++) { | |
627 | struct cache_entry *next = index->cache[pos]; | |
628 | if (len != ce_namelen(next) || | |
629 | memcmp(ce->name, next->name, len)) | |
630 | break; | |
631 | mark_ce_used(next, o); | |
632 | } | |
633 | } | |
634 | ||
635 | static struct cache_entry *next_cache_entry(struct unpack_trees_options *o) | |
636 | { | |
637 | const struct index_state *index = o->src_index; | |
638 | int pos = o->cache_bottom; | |
639 | ||
640 | while (pos < index->cache_nr) { | |
641 | struct cache_entry *ce = index->cache[pos]; | |
642 | if (!(ce->ce_flags & CE_UNPACKED)) | |
643 | return ce; | |
644 | pos++; | |
645 | } | |
646 | return NULL; | |
647 | } | |
648 | ||
9c5e6c80 | 649 | static void add_same_unmerged(const struct cache_entry *ce, |
da165f47 JH |
650 | struct unpack_trees_options *o) |
651 | { | |
652 | struct index_state *index = o->src_index; | |
653 | int len = ce_namelen(ce); | |
654 | int pos = index_name_pos(index, ce->name, len); | |
655 | ||
656 | if (0 <= pos) | |
657 | die("programming error in a caller of mark_ce_used_same_name"); | |
658 | for (pos = -pos - 1; pos < index->cache_nr; pos++) { | |
659 | struct cache_entry *next = index->cache[pos]; | |
660 | if (len != ce_namelen(next) || | |
661 | memcmp(ce->name, next->name, len)) | |
662 | break; | |
663 | add_entry(o, next, 0, 0); | |
664 | mark_ce_used(next, o); | |
665 | } | |
666 | } | |
667 | ||
668 | static int unpack_index_entry(struct cache_entry *ce, | |
669 | struct unpack_trees_options *o) | |
01904572 | 670 | { |
5828e835 | 671 | const struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; |
da165f47 | 672 | int ret; |
34110cd4 | 673 | |
66dbfd55 GV |
674 | src[0] = ce; |
675 | ||
da165f47 | 676 | mark_ce_used(ce, o); |
01904572 LT |
677 | if (ce_stage(ce)) { |
678 | if (o->skip_unmerged) { | |
34110cd4 LT |
679 | add_entry(o, ce, 0, 0); |
680 | return 0; | |
01904572 | 681 | } |
01904572 | 682 | } |
da165f47 JH |
683 | ret = call_unpack_fn(src, o); |
684 | if (ce_stage(ce)) | |
685 | mark_ce_used_same_name(ce, o); | |
686 | return ret; | |
01904572 LT |
687 | } |
688 | ||
90553847 | 689 | static int find_cache_pos(struct traverse_info *, const char *p, size_t len); |
730f7284 JH |
690 | |
691 | static void restore_cache_bottom(struct traverse_info *info, int bottom) | |
692 | { | |
693 | struct unpack_trees_options *o = info->data; | |
694 | ||
695 | if (o->diff_index_cached) | |
696 | return; | |
697 | o->cache_bottom = bottom; | |
698 | } | |
699 | ||
700 | static int switch_cache_bottom(struct traverse_info *info) | |
701 | { | |
702 | struct unpack_trees_options *o = info->data; | |
703 | int ret, pos; | |
704 | ||
705 | if (o->diff_index_cached) | |
706 | return 0; | |
707 | ret = o->cache_bottom; | |
90553847 | 708 | pos = find_cache_pos(info->prev, info->name, info->namelen); |
730f7284 JH |
709 | |
710 | if (pos < -1) | |
711 | o->cache_bottom = -2 - pos; | |
712 | else if (pos < 0) | |
713 | o->cache_bottom = o->src_index->cache_nr; | |
714 | return ret; | |
01904572 LT |
715 | } |
716 | ||
d12a8cf0 JH |
717 | static inline int are_same_oid(struct name_entry *name_j, struct name_entry *name_k) |
718 | { | |
ea82b2a0 | 719 | return !is_null_oid(&name_j->oid) && !is_null_oid(&name_k->oid) && oideq(&name_j->oid, &name_k->oid); |
d12a8cf0 JH |
720 | } |
721 | ||
b4da3738 NTND |
722 | static int all_trees_same_as_cache_tree(int n, unsigned long dirmask, |
723 | struct name_entry *names, | |
724 | struct traverse_info *info) | |
725 | { | |
726 | struct unpack_trees_options *o = info->data; | |
727 | int i; | |
728 | ||
729 | if (!o->merge || dirmask != ((1 << n) - 1)) | |
730 | return 0; | |
731 | ||
732 | for (i = 1; i < n; i++) | |
733 | if (!are_same_oid(names, names + i)) | |
734 | return 0; | |
735 | ||
736 | return cache_tree_matches_traversal(o->src_index->cache_tree, names, info); | |
737 | } | |
738 | ||
739 | static int index_pos_by_traverse_info(struct name_entry *names, | |
740 | struct traverse_info *info) | |
741 | { | |
742 | struct unpack_trees_options *o = info->data; | |
c43ab062 | 743 | struct strbuf name = STRBUF_INIT; |
b4da3738 NTND |
744 | int pos; |
745 | ||
c43ab062 JK |
746 | strbuf_make_traverse_path(&name, info, names->path, names->pathlen); |
747 | strbuf_addch(&name, '/'); | |
748 | pos = index_name_pos(o->src_index, name.buf, name.len); | |
b4da3738 NTND |
749 | if (pos >= 0) |
750 | BUG("This is a directory and should not exist in index"); | |
751 | pos = -pos - 1; | |
573117df ES |
752 | if (pos >= o->src_index->cache_nr || |
753 | !starts_with(o->src_index->cache[pos]->name, name.buf) || | |
c43ab062 | 754 | (pos > 0 && starts_with(o->src_index->cache[pos-1]->name, name.buf))) |
573117df ES |
755 | BUG("pos %d doesn't point to the first entry of %s in index", |
756 | pos, name.buf); | |
c43ab062 | 757 | strbuf_release(&name); |
b4da3738 NTND |
758 | return pos; |
759 | } | |
760 | ||
761 | /* | |
762 | * Fast path if we detect that all trees are the same as cache-tree at this | |
5f4436a7 NTND |
763 | * path. We'll walk these trees in an iterative loop using cache-tree/index |
764 | * instead of ODB since we already know what these trees contain. | |
b4da3738 NTND |
765 | */ |
766 | static int traverse_by_cache_tree(int pos, int nr_entries, int nr_names, | |
b4da3738 NTND |
767 | struct traverse_info *info) |
768 | { | |
769 | struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; | |
770 | struct unpack_trees_options *o = info->data; | |
f1e11c65 NTND |
771 | struct cache_entry *tree_ce = NULL; |
772 | int ce_len = 0; | |
b4da3738 NTND |
773 | int i, d; |
774 | ||
775 | if (!o->merge) | |
776 | BUG("We need cache-tree to do this optimization"); | |
777 | ||
778 | /* | |
779 | * Do what unpack_callback() and unpack_nondirectories() normally | |
780 | * do. But we walk all paths in an iterative loop instead. | |
781 | * | |
782 | * D/F conflicts and higher stage entries are not a concern | |
783 | * because cache-tree would be invalidated and we would never | |
784 | * get here in the first place. | |
785 | */ | |
786 | for (i = 0; i < nr_entries; i++) { | |
f1e11c65 | 787 | int new_ce_len, len, rc; |
b4da3738 NTND |
788 | |
789 | src[0] = o->src_index->cache[pos + i]; | |
790 | ||
791 | len = ce_namelen(src[0]); | |
f1e11c65 NTND |
792 | new_ce_len = cache_entry_size(len); |
793 | ||
794 | if (new_ce_len > ce_len) { | |
795 | new_ce_len <<= 1; | |
796 | tree_ce = xrealloc(tree_ce, new_ce_len); | |
797 | memset(tree_ce, 0, new_ce_len); | |
798 | ce_len = new_ce_len; | |
799 | ||
800 | tree_ce->ce_flags = create_ce_flags(0); | |
801 | ||
802 | for (d = 1; d <= nr_names; d++) | |
803 | src[d] = tree_ce; | |
804 | } | |
b4da3738 NTND |
805 | |
806 | tree_ce->ce_mode = src[0]->ce_mode; | |
b4da3738 NTND |
807 | tree_ce->ce_namelen = len; |
808 | oidcpy(&tree_ce->oid, &src[0]->oid); | |
809 | memcpy(tree_ce->name, src[0]->name, len + 1); | |
810 | ||
b4da3738 | 811 | rc = call_unpack_fn((const struct cache_entry * const *)src, o); |
f1e11c65 NTND |
812 | if (rc < 0) { |
813 | free(tree_ce); | |
b4da3738 | 814 | return rc; |
f1e11c65 | 815 | } |
b4da3738 NTND |
816 | |
817 | mark_ce_used(src[0], o); | |
818 | } | |
f1e11c65 | 819 | free(tree_ce); |
b4da3738 NTND |
820 | if (o->debug_unpack) |
821 | printf("Unpacked %d entries from %s to %s using cache-tree\n", | |
822 | nr_entries, | |
823 | o->src_index->cache[pos]->name, | |
824 | o->src_index->cache[pos + nr_entries - 1]->name); | |
825 | return 0; | |
826 | } | |
827 | ||
84563a62 JH |
828 | static int traverse_trees_recursive(int n, unsigned long dirmask, |
829 | unsigned long df_conflicts, | |
830 | struct name_entry *names, | |
831 | struct traverse_info *info) | |
16da134b | 832 | { |
67022e02 | 833 | struct unpack_trees_options *o = info->data; |
730f7284 | 834 | int i, ret, bottom; |
d12a8cf0 | 835 | int nr_buf = 0; |
ca885a4f | 836 | struct tree_desc t[MAX_UNPACK_TREES]; |
1ce584b0 | 837 | void *buf[MAX_UNPACK_TREES]; |
01904572 LT |
838 | struct traverse_info newinfo; |
839 | struct name_entry *p; | |
b4da3738 NTND |
840 | int nr_entries; |
841 | ||
842 | nr_entries = all_trees_same_as_cache_tree(n, dirmask, names, info); | |
843 | if (nr_entries > 0) { | |
b4da3738 NTND |
844 | int pos = index_pos_by_traverse_info(names, info); |
845 | ||
846 | if (!o->merge || df_conflicts) | |
847 | BUG("Wrong condition to get here buddy"); | |
848 | ||
849 | /* | |
850 | * All entries up to 'pos' must have been processed | |
851 | * (i.e. marked CE_UNPACKED) at this point. But to be safe, | |
852 | * save and restore cache_bottom anyway to not miss | |
853 | * unprocessed entries before 'pos'. | |
854 | */ | |
855 | bottom = o->cache_bottom; | |
66429698 | 856 | ret = traverse_by_cache_tree(pos, nr_entries, n, info); |
b4da3738 NTND |
857 | o->cache_bottom = bottom; |
858 | return ret; | |
859 | } | |
01904572 LT |
860 | |
861 | p = names; | |
862 | while (!p->mode) | |
863 | p++; | |
864 | ||
865 | newinfo = *info; | |
866 | newinfo.prev = info; | |
40e37256 | 867 | newinfo.pathspec = info->pathspec; |
90553847 JK |
868 | newinfo.name = p->path; |
869 | newinfo.namelen = p->pathlen; | |
870 | newinfo.mode = p->mode; | |
37806080 | 871 | newinfo.pathlen = st_add3(newinfo.pathlen, tree_entry_len(p), 1); |
603d2498 | 872 | newinfo.df_conflicts |= df_conflicts; |
01904572 | 873 | |
d12a8cf0 JH |
874 | /* |
875 | * Fetch the tree from the ODB for each peer directory in the | |
876 | * n commits. | |
877 | * | |
878 | * For 2- and 3-way traversals, we try to avoid hitting the | |
879 | * ODB twice for the same OID. This should yield a nice speed | |
880 | * up in checkouts and merges when the commits are similar. | |
881 | * | |
882 | * We don't bother doing the full O(n^2) search for larger n, | |
883 | * because wider traversals don't happen that often and we | |
884 | * avoid the search setup. | |
885 | * | |
886 | * When 2 peer OIDs are the same, we just copy the tree | |
887 | * descriptor data. This implicitly borrows the buffer | |
888 | * data from the earlier cell. | |
889 | */ | |
01904572 | 890 | for (i = 0; i < n; i++, dirmask >>= 1) { |
d12a8cf0 JH |
891 | if (i > 0 && are_same_oid(&names[i], &names[i - 1])) |
892 | t[i] = t[i - 1]; | |
893 | else if (i > 1 && are_same_oid(&names[i], &names[i - 2])) | |
894 | t[i] = t[i - 2]; | |
895 | else { | |
5c377d3d | 896 | const struct object_id *oid = NULL; |
d12a8cf0 | 897 | if (dirmask & 1) |
ea82b2a0 | 898 | oid = &names[i].oid; |
5e575807 | 899 | buf[nr_buf++] = fill_tree_descriptor(the_repository, t + i, oid); |
d12a8cf0 | 900 | } |
01904572 | 901 | } |
730f7284 JH |
902 | |
903 | bottom = switch_cache_bottom(&newinfo); | |
67022e02 | 904 | ret = traverse_trees(o->src_index, n, t, &newinfo); |
730f7284 | 905 | restore_cache_bottom(&newinfo, bottom); |
1ce584b0 | 906 | |
d12a8cf0 | 907 | for (i = 0; i < nr_buf; i++) |
1ce584b0 JN |
908 | free(buf[i]); |
909 | ||
730f7284 | 910 | return ret; |
01904572 LT |
911 | } |
912 | ||
913 | /* | |
914 | * Compare the traverse-path to the cache entry without actually | |
915 | * having to generate the textual representation of the traverse | |
916 | * path. | |
917 | * | |
918 | * NOTE! This *only* compares up to the size of the traverse path | |
919 | * itself - the caller needs to do the final check for the cache | |
920 | * entry having more data at the end! | |
921 | */ | |
90553847 JK |
922 | static int do_compare_entry_piecewise(const struct cache_entry *ce, |
923 | const struct traverse_info *info, | |
924 | const char *name, size_t namelen, | |
925 | unsigned mode) | |
01904572 | 926 | { |
90553847 | 927 | int pathlen, ce_len; |
01904572 LT |
928 | const char *ce_name; |
929 | ||
930 | if (info->prev) { | |
d9c2bd56 | 931 | int cmp = do_compare_entry_piecewise(ce, info->prev, |
90553847 JK |
932 | info->name, info->namelen, |
933 | info->mode); | |
01904572 LT |
934 | if (cmp) |
935 | return cmp; | |
936 | } | |
937 | pathlen = info->pathlen; | |
938 | ce_len = ce_namelen(ce); | |
939 | ||
940 | /* If ce_len < pathlen then we must have previously hit "name == directory" entry */ | |
941 | if (ce_len < pathlen) | |
942 | return -1; | |
943 | ||
944 | ce_len -= pathlen; | |
945 | ce_name = ce->name + pathlen; | |
946 | ||
90553847 | 947 | return df_name_compare(ce_name, ce_len, S_IFREG, name, namelen, mode); |
01904572 LT |
948 | } |
949 | ||
d9c2bd56 DT |
950 | static int do_compare_entry(const struct cache_entry *ce, |
951 | const struct traverse_info *info, | |
90553847 JK |
952 | const char *name, size_t namelen, |
953 | unsigned mode) | |
d9c2bd56 | 954 | { |
90553847 | 955 | int pathlen, ce_len; |
d9c2bd56 DT |
956 | const char *ce_name; |
957 | int cmp; | |
958 | ||
959 | /* | |
960 | * If we have not precomputed the traverse path, it is quicker | |
961 | * to avoid doing so. But if we have precomputed it, | |
962 | * it is quicker to use the precomputed version. | |
963 | */ | |
964 | if (!info->traverse_path) | |
90553847 | 965 | return do_compare_entry_piecewise(ce, info, name, namelen, mode); |
d9c2bd56 DT |
966 | |
967 | cmp = strncmp(ce->name, info->traverse_path, info->pathlen); | |
968 | if (cmp) | |
969 | return cmp; | |
970 | ||
971 | pathlen = info->pathlen; | |
972 | ce_len = ce_namelen(ce); | |
973 | ||
974 | if (ce_len < pathlen) | |
975 | return -1; | |
976 | ||
977 | ce_len -= pathlen; | |
978 | ce_name = ce->name + pathlen; | |
979 | ||
90553847 | 980 | return df_name_compare(ce_name, ce_len, S_IFREG, name, namelen, mode); |
d9c2bd56 DT |
981 | } |
982 | ||
01904572 LT |
983 | static int compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n) |
984 | { | |
90553847 | 985 | int cmp = do_compare_entry(ce, info, n->path, n->pathlen, n->mode); |
01904572 LT |
986 | if (cmp) |
987 | return cmp; | |
988 | ||
989 | /* | |
990 | * Even if the beginning compared identically, the ce should | |
991 | * compare as bigger than a directory leading up to it! | |
992 | */ | |
b3b3cbcb | 993 | return ce_namelen(ce) > traverse_path_len(info, tree_entry_len(n)); |
01904572 LT |
994 | } |
995 | ||
da165f47 JH |
996 | static int ce_in_traverse_path(const struct cache_entry *ce, |
997 | const struct traverse_info *info) | |
998 | { | |
999 | if (!info->prev) | |
1000 | return 1; | |
90553847 JK |
1001 | if (do_compare_entry(ce, info->prev, |
1002 | info->name, info->namelen, info->mode)) | |
da165f47 JH |
1003 | return 0; |
1004 | /* | |
1005 | * If ce (blob) is the same name as the path (which is a tree | |
1006 | * we will be descending into), it won't be inside it. | |
1007 | */ | |
1008 | return (info->pathlen < ce_namelen(ce)); | |
1009 | } | |
1010 | ||
a849735b JM |
1011 | static struct cache_entry *create_ce_entry(const struct traverse_info *info, |
1012 | const struct name_entry *n, | |
1013 | int stage, | |
1014 | struct index_state *istate, | |
1015 | int is_transient) | |
01904572 | 1016 | { |
b3b3cbcb | 1017 | size_t len = traverse_path_len(info, tree_entry_len(n)); |
a849735b JM |
1018 | struct cache_entry *ce = |
1019 | is_transient ? | |
1020 | make_empty_transient_cache_entry(len) : | |
1021 | make_empty_cache_entry(istate, len); | |
01904572 LT |
1022 | |
1023 | ce->ce_mode = create_ce_mode(n->mode); | |
b60e188c TG |
1024 | ce->ce_flags = create_ce_flags(stage); |
1025 | ce->ce_namelen = len; | |
ea82b2a0 | 1026 | oidcpy(&ce->oid, &n->oid); |
5aa02f98 JK |
1027 | /* len+1 because the cache_entry allocates space for NUL */ |
1028 | make_traverse_path(ce->name, len + 1, info, n->path, n->pathlen); | |
01904572 LT |
1029 | |
1030 | return ce; | |
1031 | } | |
1032 | ||
b4da3738 NTND |
1033 | /* |
1034 | * Note that traverse_by_cache_tree() duplicates some logic in this function | |
1035 | * without actually calling it. If you change the logic here you may need to | |
1036 | * check and change there as well. | |
1037 | */ | |
c7cddc1a RS |
1038 | static int unpack_nondirectories(int n, unsigned long mask, |
1039 | unsigned long dirmask, | |
1040 | struct cache_entry **src, | |
1041 | const struct name_entry *names, | |
1042 | const struct traverse_info *info) | |
01904572 LT |
1043 | { |
1044 | int i; | |
1045 | struct unpack_trees_options *o = info->data; | |
603d2498 | 1046 | unsigned long conflicts = info->df_conflicts | dirmask; |
01904572 LT |
1047 | |
1048 | /* Do we have *only* directories? Nothing to do */ | |
1049 | if (mask == dirmask && !src[0]) | |
1050 | return 0; | |
1051 | ||
01904572 LT |
1052 | /* |
1053 | * Ok, we've filled in up to any potential index entry in src[0], | |
1054 | * now do the rest. | |
1055 | */ | |
1056 | for (i = 0; i < n; i++) { | |
1057 | int stage; | |
1058 | unsigned int bit = 1ul << i; | |
1059 | if (conflicts & bit) { | |
1060 | src[i + o->merge] = o->df_conflict_entry; | |
1061 | continue; | |
1062 | } | |
1063 | if (!(mask & bit)) | |
1064 | continue; | |
1065 | if (!o->merge) | |
1066 | stage = 0; | |
1067 | else if (i + 1 < o->head_idx) | |
1068 | stage = 1; | |
1069 | else if (i + 1 > o->head_idx) | |
1070 | stage = 3; | |
1071 | else | |
1072 | stage = 2; | |
a849735b JM |
1073 | |
1074 | /* | |
1075 | * If the merge bit is set, then the cache entries are | |
1076 | * discarded in the following block. In this case, | |
1077 | * construct "transient" cache_entries, as they are | |
1078 | * not stored in the index. otherwise construct the | |
1079 | * cache entry from the index aware logic. | |
1080 | */ | |
1081 | src[i + o->merge] = create_ce_entry(info, names + i, stage, &o->result, o->merge); | |
01904572 LT |
1082 | } |
1083 | ||
5d80ef5a RS |
1084 | if (o->merge) { |
1085 | int rc = call_unpack_fn((const struct cache_entry * const *)src, | |
1086 | o); | |
1087 | for (i = 0; i < n; i++) { | |
1088 | struct cache_entry *ce = src[i + o->merge]; | |
1089 | if (ce != o->df_conflict_entry) | |
a849735b | 1090 | discard_cache_entry(ce); |
5d80ef5a RS |
1091 | } |
1092 | return rc; | |
1093 | } | |
01904572 | 1094 | |
01904572 | 1095 | for (i = 0; i < n; i++) |
aab3b9a1 | 1096 | if (src[i] && src[i] != o->df_conflict_entry) |
46169180 JK |
1097 | if (do_add_entry(o, src[i], 0, 0)) |
1098 | return -1; | |
1099 | ||
01904572 LT |
1100 | return 0; |
1101 | } | |
1102 | ||
353c5eeb JH |
1103 | static int unpack_failed(struct unpack_trees_options *o, const char *message) |
1104 | { | |
1105 | discard_index(&o->result); | |
b165fac8 | 1106 | if (!o->quiet && !o->exiting_early) { |
353c5eeb JH |
1107 | if (message) |
1108 | return error("%s", message); | |
1109 | return -1; | |
1110 | } | |
1111 | return -1; | |
1112 | } | |
1113 | ||
730f7284 JH |
1114 | /* |
1115 | * The tree traversal is looking at name p. If we have a matching entry, | |
1116 | * return it. If name p is a directory in the index, do not return | |
1117 | * anything, as we will want to match it when the traversal descends into | |
1118 | * the directory. | |
1119 | */ | |
1120 | static int find_cache_pos(struct traverse_info *info, | |
90553847 | 1121 | const char *p, size_t p_len) |
730f7284 JH |
1122 | { |
1123 | int pos; | |
1124 | struct unpack_trees_options *o = info->data; | |
1125 | struct index_state *index = o->src_index; | |
1126 | int pfxlen = info->pathlen; | |
730f7284 JH |
1127 | |
1128 | for (pos = o->cache_bottom; pos < index->cache_nr; pos++) { | |
9c5e6c80 | 1129 | const struct cache_entry *ce = index->cache[pos]; |
730f7284 JH |
1130 | const char *ce_name, *ce_slash; |
1131 | int cmp, ce_len; | |
1132 | ||
e53e6b44 BD |
1133 | if (ce->ce_flags & CE_UNPACKED) { |
1134 | /* | |
1135 | * cache_bottom entry is already unpacked, so | |
1136 | * we can never match it; don't check it | |
1137 | * again. | |
1138 | */ | |
1139 | if (pos == o->cache_bottom) | |
1140 | ++o->cache_bottom; | |
730f7284 | 1141 | continue; |
e53e6b44 | 1142 | } |
a6720955 DT |
1143 | if (!ce_in_traverse_path(ce, info)) { |
1144 | /* | |
1145 | * Check if we can skip future cache checks | |
1146 | * (because we're already past all possible | |
1147 | * entries in the traverse path). | |
1148 | */ | |
1149 | if (info->traverse_path) { | |
1150 | if (strncmp(ce->name, info->traverse_path, | |
1151 | info->pathlen) > 0) | |
1152 | break; | |
1153 | } | |
730f7284 | 1154 | continue; |
a6720955 | 1155 | } |
730f7284 JH |
1156 | ce_name = ce->name + pfxlen; |
1157 | ce_slash = strchr(ce_name, '/'); | |
1158 | if (ce_slash) | |
1159 | ce_len = ce_slash - ce_name; | |
1160 | else | |
1161 | ce_len = ce_namelen(ce) - pfxlen; | |
90553847 | 1162 | cmp = name_compare(p, p_len, ce_name, ce_len); |
730f7284 JH |
1163 | /* |
1164 | * Exact match; if we have a directory we need to | |
1165 | * delay returning it. | |
1166 | */ | |
1167 | if (!cmp) | |
1168 | return ce_slash ? -2 - pos : pos; | |
1169 | if (0 < cmp) | |
1170 | continue; /* keep looking */ | |
1171 | /* | |
1172 | * ce_name sorts after p->path; could it be that we | |
1173 | * have files under p->path directory in the index? | |
1174 | * E.g. ce_name == "t-i", and p->path == "t"; we may | |
1175 | * have "t/a" in the index. | |
1176 | */ | |
90553847 | 1177 | if (p_len < ce_len && !memcmp(ce_name, p, p_len) && |
730f7284 JH |
1178 | ce_name[p_len] < '/') |
1179 | continue; /* keep looking */ | |
1180 | break; | |
1181 | } | |
1182 | return -1; | |
1183 | } | |
1184 | ||
1185 | static struct cache_entry *find_cache_entry(struct traverse_info *info, | |
1186 | const struct name_entry *p) | |
1187 | { | |
90553847 | 1188 | int pos = find_cache_pos(info, p->path, p->pathlen); |
730f7284 JH |
1189 | struct unpack_trees_options *o = info->data; |
1190 | ||
1191 | if (0 <= pos) | |
1192 | return o->src_index->cache[pos]; | |
1193 | else | |
1194 | return NULL; | |
1195 | } | |
1196 | ||
ba655da5 JH |
1197 | static void debug_path(struct traverse_info *info) |
1198 | { | |
1199 | if (info->prev) { | |
1200 | debug_path(info->prev); | |
90553847 | 1201 | if (*info->prev->name) |
ba655da5 JH |
1202 | putchar('/'); |
1203 | } | |
90553847 | 1204 | printf("%s", info->name); |
ba655da5 JH |
1205 | } |
1206 | ||
1207 | static void debug_name_entry(int i, struct name_entry *n) | |
1208 | { | |
1209 | printf("ent#%d %06o %s\n", i, | |
1210 | n->path ? n->mode : 0, | |
1211 | n->path ? n->path : "(missing)"); | |
1212 | } | |
1213 | ||
1214 | static void debug_unpack_callback(int n, | |
1215 | unsigned long mask, | |
1216 | unsigned long dirmask, | |
1217 | struct name_entry *names, | |
1218 | struct traverse_info *info) | |
1219 | { | |
1220 | int i; | |
1221 | printf("* unpack mask %lu, dirmask %lu, cnt %d ", | |
1222 | mask, dirmask, n); | |
1223 | debug_path(info); | |
1224 | putchar('\n'); | |
1225 | for (i = 0; i < n; i++) | |
1226 | debug_name_entry(i, names + i); | |
1227 | } | |
1228 | ||
b4da3738 NTND |
1229 | /* |
1230 | * Note that traverse_by_cache_tree() duplicates some logic in this function | |
1231 | * without actually calling it. If you change the logic here you may need to | |
1232 | * check and change there as well. | |
1233 | */ | |
01904572 LT |
1234 | static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info) |
1235 | { | |
c7cddc1a | 1236 | struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; |
01904572 | 1237 | struct unpack_trees_options *o = info->data; |
01904572 LT |
1238 | const struct name_entry *p = names; |
1239 | ||
1240 | /* Find first entry with a real name (we could use "mask" too) */ | |
1241 | while (!p->mode) | |
1242 | p++; | |
1243 | ||
ba655da5 JH |
1244 | if (o->debug_unpack) |
1245 | debug_unpack_callback(n, mask, dirmask, names, info); | |
1246 | ||
01904572 LT |
1247 | /* Are we supposed to look at the index too? */ |
1248 | if (o->merge) { | |
da165f47 | 1249 | while (1) { |
da165f47 | 1250 | int cmp; |
730f7284 JH |
1251 | struct cache_entry *ce; |
1252 | ||
1253 | if (o->diff_index_cached) | |
1254 | ce = next_cache_entry(o); | |
1255 | else | |
1256 | ce = find_cache_entry(info, p); | |
1257 | ||
da165f47 JH |
1258 | if (!ce) |
1259 | break; | |
1260 | cmp = compare_entry(ce, info, p); | |
01904572 LT |
1261 | if (cmp < 0) { |
1262 | if (unpack_index_entry(ce, o) < 0) | |
353c5eeb | 1263 | return unpack_failed(o, NULL); |
01904572 LT |
1264 | continue; |
1265 | } | |
1266 | if (!cmp) { | |
1267 | if (ce_stage(ce)) { | |
1268 | /* | |
da165f47 JH |
1269 | * If we skip unmerged index |
1270 | * entries, we'll skip this | |
1271 | * entry *and* the tree | |
1272 | * entries associated with it! | |
01904572 | 1273 | */ |
34110cd4 | 1274 | if (o->skip_unmerged) { |
da165f47 | 1275 | add_same_unmerged(ce, o); |
01904572 | 1276 | return mask; |
34110cd4 | 1277 | } |
01904572 LT |
1278 | } |
1279 | src[0] = ce; | |
01904572 LT |
1280 | } |
1281 | break; | |
1282 | } | |
1283 | } | |
1284 | ||
34110cd4 | 1285 | if (unpack_nondirectories(n, mask, dirmask, src, names, info) < 0) |
01904572 LT |
1286 | return -1; |
1287 | ||
97e5954b | 1288 | if (o->merge && src[0]) { |
da165f47 JH |
1289 | if (ce_stage(src[0])) |
1290 | mark_ce_used_same_name(src[0], o); | |
1291 | else | |
1292 | mark_ce_used(src[0], o); | |
1293 | } | |
1294 | ||
01904572 LT |
1295 | /* Now handle any directories.. */ |
1296 | if (dirmask) { | |
b65982b6 JH |
1297 | /* special case: "diff-index --cached" looking at a tree */ |
1298 | if (o->diff_index_cached && | |
1299 | n == 1 && dirmask == 1 && S_ISDIR(names->mode)) { | |
1300 | int matches; | |
1301 | matches = cache_tree_matches_traversal(o->src_index->cache_tree, | |
1302 | names, info); | |
1303 | /* | |
da165f47 JH |
1304 | * Everything under the name matches; skip the |
1305 | * entire hierarchy. diff_index_cached codepath | |
1306 | * special cases D/F conflicts in such a way that | |
1307 | * it does not do any look-ahead, so this is safe. | |
b65982b6 JH |
1308 | */ |
1309 | if (matches) { | |
da165f47 | 1310 | o->cache_bottom += matches; |
b65982b6 JH |
1311 | return mask; |
1312 | } | |
1313 | } | |
1314 | ||
603d2498 | 1315 | if (traverse_trees_recursive(n, dirmask, mask & ~dirmask, |
542c264b JH |
1316 | names, info) < 0) |
1317 | return -1; | |
01904572 LT |
1318 | return mask; |
1319 | } | |
1320 | ||
1321 | return mask; | |
1322 | } | |
1323 | ||
27c82fb3 NTND |
1324 | static int clear_ce_flags_1(struct index_state *istate, |
1325 | struct cache_entry **cache, int nr, | |
fc2b6214 | 1326 | struct strbuf *prefix, |
28911091 | 1327 | int select_mask, int clear_mask, |
468ce99b | 1328 | struct pattern_list *pl, |
4dcd4def DS |
1329 | enum pattern_match_result default_match, |
1330 | int progress_nr); | |
28911091 | 1331 | |
9037026d | 1332 | /* Whole directory matching */ |
27c82fb3 NTND |
1333 | static int clear_ce_flags_dir(struct index_state *istate, |
1334 | struct cache_entry **cache, int nr, | |
fc2b6214 | 1335 | struct strbuf *prefix, |
9037026d NTND |
1336 | char *basename, |
1337 | int select_mask, int clear_mask, | |
468ce99b | 1338 | struct pattern_list *pl, |
4dcd4def DS |
1339 | enum pattern_match_result default_match, |
1340 | int progress_nr) | |
9037026d | 1341 | { |
28911091 | 1342 | struct cache_entry **cache_end; |
9037026d | 1343 | int dtype = DT_DIR; |
fc2b6214 | 1344 | int rc; |
eb42feca DS |
1345 | enum pattern_match_result ret, orig_ret; |
1346 | orig_ret = path_matches_pattern_list(prefix->buf, prefix->len, | |
1347 | basename, &dtype, pl, istate); | |
9037026d | 1348 | |
fc2b6214 | 1349 | strbuf_addch(prefix, '/'); |
9037026d | 1350 | |
28911091 | 1351 | /* If undecided, use matching result of parent dir in defval */ |
eb42feca | 1352 | if (orig_ret == UNDECIDED) |
468ce99b | 1353 | ret = default_match; |
eb42feca DS |
1354 | else |
1355 | ret = orig_ret; | |
9037026d | 1356 | |
28911091 NTND |
1357 | for (cache_end = cache; cache_end != cache + nr; cache_end++) { |
1358 | struct cache_entry *ce = *cache_end; | |
fc2b6214 | 1359 | if (strncmp(ce->name, prefix->buf, prefix->len)) |
28911091 | 1360 | break; |
9037026d NTND |
1361 | } |
1362 | ||
eb42feca DS |
1363 | if (pl->use_cone_patterns && orig_ret == MATCHED_RECURSIVE) { |
1364 | struct cache_entry **ce = cache; | |
4c6c7971 | 1365 | rc = cache_end - cache; |
eb42feca DS |
1366 | |
1367 | while (ce < cache_end) { | |
1368 | (*ce)->ce_flags &= ~clear_mask; | |
1369 | ce++; | |
1370 | } | |
1371 | } else if (pl->use_cone_patterns && orig_ret == NOT_MATCHED) { | |
4c6c7971 | 1372 | rc = cache_end - cache; |
eb42feca DS |
1373 | } else { |
1374 | rc = clear_ce_flags_1(istate, cache, cache_end - cache, | |
1375 | prefix, | |
1376 | select_mask, clear_mask, | |
4dcd4def DS |
1377 | pl, ret, |
1378 | progress_nr); | |
eb42feca DS |
1379 | } |
1380 | ||
fc2b6214 AP |
1381 | strbuf_setlen(prefix, prefix->len - 1); |
1382 | return rc; | |
9037026d NTND |
1383 | } |
1384 | ||
1385 | /* | |
1386 | * Traverse the index, find every entry that matches according to | |
caa3d554 | 1387 | * o->pl. Do "ce_flags &= ~clear_mask" on those entries. Return the |
9037026d NTND |
1388 | * number of traversed entries. |
1389 | * | |
1390 | * If select_mask is non-zero, only entries whose ce_flags has on of | |
1391 | * those bits enabled are traversed. | |
1392 | * | |
1393 | * cache : pointer to an index entry | |
1394 | * prefix_len : an offset to its path | |
1395 | * | |
1396 | * The current path ("prefix") including the trailing '/' is | |
1397 | * cache[0]->name[0..(prefix_len-1)] | |
1398 | * Top level path has prefix_len zero. | |
1399 | */ | |
27c82fb3 NTND |
1400 | static int clear_ce_flags_1(struct index_state *istate, |
1401 | struct cache_entry **cache, int nr, | |
fc2b6214 | 1402 | struct strbuf *prefix, |
9037026d | 1403 | int select_mask, int clear_mask, |
468ce99b | 1404 | struct pattern_list *pl, |
4dcd4def DS |
1405 | enum pattern_match_result default_match, |
1406 | int progress_nr) | |
9037026d | 1407 | { |
d20bc01a | 1408 | struct cache_entry **cache_end = nr ? cache + nr : cache; |
9037026d NTND |
1409 | |
1410 | /* | |
1411 | * Process all entries that have the given prefix and meet | |
1412 | * select_mask condition | |
1413 | */ | |
1414 | while(cache != cache_end) { | |
1415 | struct cache_entry *ce = *cache; | |
1416 | const char *name, *slash; | |
468ce99b DS |
1417 | int len, dtype; |
1418 | enum pattern_match_result ret; | |
9037026d | 1419 | |
4dcd4def DS |
1420 | display_progress(istate->progress, progress_nr); |
1421 | ||
9037026d NTND |
1422 | if (select_mask && !(ce->ce_flags & select_mask)) { |
1423 | cache++; | |
4dcd4def | 1424 | progress_nr++; |
9037026d NTND |
1425 | continue; |
1426 | } | |
1427 | ||
fc2b6214 | 1428 | if (prefix->len && strncmp(ce->name, prefix->buf, prefix->len)) |
9037026d NTND |
1429 | break; |
1430 | ||
fc2b6214 | 1431 | name = ce->name + prefix->len; |
9037026d NTND |
1432 | slash = strchr(name, '/'); |
1433 | ||
1434 | /* If it's a directory, try whole directory match first */ | |
1435 | if (slash) { | |
1436 | int processed; | |
1437 | ||
1438 | len = slash - name; | |
fc2b6214 | 1439 | strbuf_add(prefix, name, len); |
9037026d | 1440 | |
27c82fb3 | 1441 | processed = clear_ce_flags_dir(istate, cache, cache_end - cache, |
fc2b6214 AP |
1442 | prefix, |
1443 | prefix->buf + prefix->len - len, | |
9037026d | 1444 | select_mask, clear_mask, |
4dcd4def DS |
1445 | pl, default_match, |
1446 | progress_nr); | |
9037026d NTND |
1447 | |
1448 | /* clear_c_f_dir eats a whole dir already? */ | |
1449 | if (processed) { | |
1450 | cache += processed; | |
4dcd4def | 1451 | progress_nr += processed; |
fc2b6214 | 1452 | strbuf_setlen(prefix, prefix->len - len); |
9037026d NTND |
1453 | continue; |
1454 | } | |
1455 | ||
fc2b6214 | 1456 | strbuf_addch(prefix, '/'); |
4dcd4def DS |
1457 | processed = clear_ce_flags_1(istate, cache, cache_end - cache, |
1458 | prefix, | |
1459 | select_mask, clear_mask, pl, | |
1460 | default_match, progress_nr); | |
1461 | ||
1462 | cache += processed; | |
1463 | progress_nr += processed; | |
1464 | ||
fc2b6214 | 1465 | strbuf_setlen(prefix, prefix->len - len - 1); |
9037026d NTND |
1466 | continue; |
1467 | } | |
1468 | ||
1469 | /* Non-directory */ | |
1470 | dtype = ce_to_dtype(ce); | |
468ce99b DS |
1471 | ret = path_matches_pattern_list(ce->name, |
1472 | ce_namelen(ce), | |
1473 | name, &dtype, pl, istate); | |
1474 | if (ret == UNDECIDED) | |
1475 | ret = default_match; | |
f998a3f1 | 1476 | if (ret == MATCHED || ret == MATCHED_RECURSIVE) |
9037026d NTND |
1477 | ce->ce_flags &= ~clear_mask; |
1478 | cache++; | |
4dcd4def | 1479 | progress_nr++; |
9037026d | 1480 | } |
4dcd4def DS |
1481 | |
1482 | display_progress(istate->progress, progress_nr); | |
9037026d NTND |
1483 | return nr - (cache_end - cache); |
1484 | } | |
1485 | ||
27c82fb3 NTND |
1486 | static int clear_ce_flags(struct index_state *istate, |
1487 | int select_mask, int clear_mask, | |
4dcd4def DS |
1488 | struct pattern_list *pl, |
1489 | int show_progress) | |
9037026d | 1490 | { |
fc2b6214 | 1491 | static struct strbuf prefix = STRBUF_INIT; |
e6152e35 JH |
1492 | char label[100]; |
1493 | int rval; | |
fc2b6214 AP |
1494 | |
1495 | strbuf_reset(&prefix); | |
4dcd4def DS |
1496 | if (show_progress) |
1497 | istate->progress = start_delayed_progress( | |
1498 | _("Updating index flags"), | |
1499 | istate->cache_nr); | |
fc2b6214 | 1500 | |
e6152e35 JH |
1501 | xsnprintf(label, sizeof(label), "clear_ce_flags(0x%08lx,0x%08lx)", |
1502 | (unsigned long)select_mask, (unsigned long)clear_mask); | |
1503 | trace2_region_enter("unpack_trees", label, the_repository); | |
1504 | rval = clear_ce_flags_1(istate, | |
27c82fb3 NTND |
1505 | istate->cache, |
1506 | istate->cache_nr, | |
fc2b6214 | 1507 | &prefix, |
9037026d | 1508 | select_mask, clear_mask, |
4dcd4def | 1509 | pl, 0, 0); |
e6152e35 JH |
1510 | trace2_region_leave("unpack_trees", label, the_repository); |
1511 | ||
4dcd4def | 1512 | stop_progress(&istate->progress); |
e6152e35 | 1513 | return rval; |
9037026d NTND |
1514 | } |
1515 | ||
2431afbf NTND |
1516 | /* |
1517 | * Set/Clear CE_NEW_SKIP_WORKTREE according to $GIT_DIR/info/sparse-checkout | |
1518 | */ | |
caa3d554 | 1519 | static void mark_new_skip_worktree(struct pattern_list *pl, |
86016ec3 | 1520 | struct index_state *istate, |
4dcd4def DS |
1521 | int select_flag, int skip_wt_flag, |
1522 | int show_progress) | |
2431afbf NTND |
1523 | { |
1524 | int i; | |
1525 | ||
9037026d NTND |
1526 | /* |
1527 | * 1. Pretend the narrowest worktree: only unmerged entries | |
1528 | * are checked out | |
1529 | */ | |
86016ec3 NTND |
1530 | for (i = 0; i < istate->cache_nr; i++) { |
1531 | struct cache_entry *ce = istate->cache[i]; | |
2431afbf NTND |
1532 | |
1533 | if (select_flag && !(ce->ce_flags & select_flag)) | |
1534 | continue; | |
1535 | ||
b33fdfc3 | 1536 | if (!ce_stage(ce) && !(ce->ce_flags & CE_CONFLICTED)) |
2431afbf NTND |
1537 | ce->ce_flags |= skip_wt_flag; |
1538 | else | |
1539 | ce->ce_flags &= ~skip_wt_flag; | |
1540 | } | |
9037026d NTND |
1541 | |
1542 | /* | |
1543 | * 2. Widen worktree according to sparse-checkout file. | |
1544 | * Matched entries will have skip_wt_flag cleared (i.e. "in") | |
1545 | */ | |
4dcd4def | 1546 | clear_ce_flags(istate, select_flag, skip_wt_flag, pl, show_progress); |
2431afbf NTND |
1547 | } |
1548 | ||
30e89c12 EN |
1549 | static void populate_from_existing_patterns(struct unpack_trees_options *o, |
1550 | struct pattern_list *pl) | |
1551 | { | |
1552 | char *sparse = git_pathdup("info/sparse-checkout"); | |
1553 | ||
1554 | pl->use_cone_patterns = core_sparse_checkout_cone; | |
1555 | if (add_patterns_from_file_to_list(sparse, "", 0, pl, NULL) < 0) | |
1556 | o->skip_sparse_checkout = 1; | |
1557 | else | |
1558 | o->pl = pl; | |
1559 | free(sparse); | |
1560 | } | |
1561 | ||
1562 | ||
eb9ae4b5 RS |
1563 | static int verify_absent(const struct cache_entry *, |
1564 | enum unpack_trees_error_types, | |
1565 | struct unpack_trees_options *); | |
2e2b887d JH |
1566 | /* |
1567 | * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the | |
1568 | * resulting index, -2 on failure to reflect the changes to the work tree. | |
2431afbf NTND |
1569 | * |
1570 | * CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally | |
2e2b887d | 1571 | */ |
01904572 LT |
1572 | int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o) |
1573 | { | |
e800ec9d | 1574 | int i, ret; |
0fb1eaa8 | 1575 | static struct cache_entry *dfc; |
caa3d554 | 1576 | struct pattern_list pl; |
fa0bde45 | 1577 | int free_pattern_list = 0; |
16da134b | 1578 | |
ca885a4f JH |
1579 | if (len > MAX_UNPACK_TREES) |
1580 | die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES); | |
16da134b | 1581 | |
0d1ed596 | 1582 | trace_performance_enter(); |
08aefc9e NTND |
1583 | if (!core_apply_sparse_checkout || !o->update) |
1584 | o->skip_sparse_checkout = 1; | |
e091228e | 1585 | if (!o->skip_sparse_checkout && !o->pl) { |
30e89c12 | 1586 | memset(&pl, 0, sizeof(pl)); |
fa0bde45 | 1587 | free_pattern_list = 1; |
30e89c12 | 1588 | populate_from_existing_patterns(o, &pl); |
08aefc9e NTND |
1589 | } |
1590 | ||
34110cd4 | 1591 | memset(&o->result, 0, sizeof(o->result)); |
913e0e99 | 1592 | o->result.initialized = 1; |
da165f47 JH |
1593 | o->result.timestamp.sec = o->src_index->timestamp.sec; |
1594 | o->result.timestamp.nsec = o->src_index->timestamp.nsec; | |
9170c7ab | 1595 | o->result.version = o->src_index->version; |
7db11830 EN |
1596 | if (!o->src_index->split_index) { |
1597 | o->result.split_index = NULL; | |
1598 | } else if (o->src_index == o->dst_index) { | |
1599 | /* | |
1600 | * o->dst_index (and thus o->src_index) will be discarded | |
1601 | * and overwritten with o->result at the end of this function, | |
1602 | * so just use src_index's split_index to avoid having to | |
1603 | * create a new one. | |
1604 | */ | |
1605 | o->result.split_index = o->src_index->split_index; | |
5fc2fc8f | 1606 | o->result.split_index->refcount++; |
7db11830 EN |
1607 | } else { |
1608 | o->result.split_index = init_split_index(&o->result); | |
1609 | } | |
75691ea3 | 1610 | oidcpy(&o->result.oid, &o->src_index->oid); |
16da134b | 1611 | o->merge_size = len; |
da165f47 | 1612 | mark_all_ce_unused(o->src_index); |
0fb1eaa8 | 1613 | |
679f2f9f US |
1614 | if (o->src_index->fsmonitor_last_update) |
1615 | o->result.fsmonitor_last_update = o->src_index->fsmonitor_last_update; | |
1616 | ||
2431afbf NTND |
1617 | /* |
1618 | * Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries | |
1619 | */ | |
1620 | if (!o->skip_sparse_checkout) | |
4dcd4def DS |
1621 | mark_new_skip_worktree(o->pl, o->src_index, 0, |
1622 | CE_NEW_SKIP_WORKTREE, o->verbose_update); | |
2431afbf | 1623 | |
0fb1eaa8 | 1624 | if (!dfc) |
13494ed1 | 1625 | dfc = xcalloc(1, cache_entry_size(0)); |
0fb1eaa8 | 1626 | o->df_conflict_entry = dfc; |
16da134b JS |
1627 | |
1628 | if (len) { | |
01904572 LT |
1629 | const char *prefix = o->prefix ? o->prefix : ""; |
1630 | struct traverse_info info; | |
1631 | ||
1632 | setup_traverse_info(&info, prefix); | |
1633 | info.fn = unpack_callback; | |
1634 | info.data = o; | |
e6c111b4 | 1635 | info.show_all_errors = o->show_all_errors; |
40e37256 | 1636 | info.pathspec = o->pathspec; |
01904572 | 1637 | |
da165f47 JH |
1638 | if (o->prefix) { |
1639 | /* | |
1640 | * Unpack existing index entries that sort before the | |
1641 | * prefix the tree is spliced into. Note that o->merge | |
1642 | * is always true in this case. | |
1643 | */ | |
1644 | while (1) { | |
1645 | struct cache_entry *ce = next_cache_entry(o); | |
1646 | if (!ce) | |
1647 | break; | |
1648 | if (ce_in_traverse_path(ce, &info)) | |
1649 | break; | |
1650 | if (unpack_index_entry(ce, o) < 0) | |
1651 | goto return_failed; | |
1652 | } | |
08aefc9e | 1653 | } |
da165f47 | 1654 | |
0d1ed596 | 1655 | trace_performance_enter(); |
67022e02 | 1656 | ret = traverse_trees(o->src_index, len, t, &info); |
0d1ed596 NTND |
1657 | trace_performance_leave("traverse_trees"); |
1658 | if (ret < 0) | |
da165f47 | 1659 | goto return_failed; |
16da134b JS |
1660 | } |
1661 | ||
01904572 LT |
1662 | /* Any left-over entries in the index? */ |
1663 | if (o->merge) { | |
da165f47 JH |
1664 | while (1) { |
1665 | struct cache_entry *ce = next_cache_entry(o); | |
1666 | if (!ce) | |
1667 | break; | |
01904572 | 1668 | if (unpack_index_entry(ce, o) < 0) |
da165f47 | 1669 | goto return_failed; |
17e46426 | 1670 | } |
17e46426 | 1671 | } |
da165f47 | 1672 | mark_all_ce_unused(o->src_index); |
16da134b | 1673 | |
08aefc9e NTND |
1674 | if (o->trivial_merges_only && o->nontrivial_merge) { |
1675 | ret = unpack_failed(o, "Merge requires file-level merging"); | |
1676 | goto done; | |
1677 | } | |
01904572 | 1678 | |
e800ec9d | 1679 | if (!o->skip_sparse_checkout) { |
9e1afb16 | 1680 | int empty_worktree = 1; |
2431afbf NTND |
1681 | |
1682 | /* | |
1683 | * Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1 | |
031ba55b | 1684 | * If they will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE |
2431afbf NTND |
1685 | * so apply_sparse_checkout() won't attempt to remove it from worktree |
1686 | */ | |
4dcd4def DS |
1687 | mark_new_skip_worktree(o->pl, &o->result, |
1688 | CE_ADDED, CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE, | |
1689 | o->verbose_update); | |
2431afbf | 1690 | |
17d26a4d | 1691 | ret = 0; |
2431afbf | 1692 | for (i = 0; i < o->result.cache_nr; i++) { |
e800ec9d NTND |
1693 | struct cache_entry *ce = o->result.cache[i]; |
1694 | ||
2431afbf NTND |
1695 | /* |
1696 | * Entries marked with CE_ADDED in merged_entry() do not have | |
1697 | * verify_absent() check (the check is effectively disabled | |
1698 | * because CE_NEW_SKIP_WORKTREE is set unconditionally). | |
1699 | * | |
1700 | * Do the real check now because we have had | |
1701 | * correct CE_NEW_SKIP_WORKTREE | |
1702 | */ | |
1703 | if (ce->ce_flags & CE_ADDED && | |
681c637b EN |
1704 | verify_absent(ce, WARNING_SPARSE_ORPHANED_NOT_OVERWRITTEN, o)) |
1705 | ret = 1; | |
1706 | ||
1707 | if (apply_sparse_checkout(&o->result, ce, o)) | |
1708 | ret = 1; | |
2431afbf | 1709 | |
eec3fc03 | 1710 | if (!ce_skip_worktree(ce)) |
9e1afb16 | 1711 | empty_worktree = 0; |
e800ec9d | 1712 | } |
a7bc906f NTND |
1713 | /* |
1714 | * Sparse checkout is meant to narrow down checkout area | |
1715 | * but it does not make sense to narrow down to empty working | |
1716 | * tree. This is usually a mistake in sparse checkout rules. | |
1717 | * Do not allow users to do that. | |
1718 | */ | |
9e1afb16 NTND |
1719 | if (o->result.cache_nr && empty_worktree) { |
1720 | ret = unpack_failed(o, "Sparse checkout leaves no entry on working directory"); | |
1721 | goto done; | |
1722 | } | |
681c637b EN |
1723 | if (ret == 1) { |
1724 | /* | |
1725 | * Inability to sparsify or de-sparsify individual | |
1726 | * paths is not an error, but just a warning. | |
1727 | */ | |
1728 | if (o->show_all_errors) | |
1729 | display_warning_msgs(o); | |
1730 | ret = 0; | |
1731 | } | |
e800ec9d | 1732 | } |
01904572 | 1733 | |
b0a5a12a | 1734 | ret = check_updates(o, &o->result) ? (-2) : 0; |
e28f7641 | 1735 | if (o->dst_index) { |
836ef2b6 | 1736 | move_index_extensions(&o->result, o->src_index); |
52fca218 | 1737 | if (!ret) { |
4592e608 | 1738 | if (git_env_bool("GIT_TEST_CHECK_CACHE_TREE", 0)) |
c207e9e1 | 1739 | cache_tree_verify(the_repository, &o->result); |
52fca218 BD |
1740 | if (!o->result.cache_tree) |
1741 | o->result.cache_tree = cache_tree(); | |
1742 | if (!cache_tree_fully_valid(o->result.cache_tree)) | |
1743 | cache_tree_update(&o->result, | |
1744 | WRITE_TREE_SILENT | | |
1745 | WRITE_TREE_REPAIR); | |
1746 | } | |
1956ecd0 BP |
1747 | |
1748 | o->result.updated_workdir = 1; | |
e28f7641 | 1749 | discard_index(o->dst_index); |
34110cd4 | 1750 | *o->dst_index = o->result; |
a16cc8b2 JH |
1751 | } else { |
1752 | discard_index(&o->result); | |
e28f7641 | 1753 | } |
7db11830 | 1754 | o->src_index = NULL; |
08aefc9e NTND |
1755 | |
1756 | done: | |
fa0bde45 | 1757 | if (free_pattern_list) |
e091228e | 1758 | clear_pattern_list(&pl); |
fa0bde45 | 1759 | trace_performance_leave("unpack_trees"); |
2e2b887d | 1760 | return ret; |
da165f47 JH |
1761 | |
1762 | return_failed: | |
e6c111b4 MM |
1763 | if (o->show_all_errors) |
1764 | display_error_msgs(o); | |
da165f47 | 1765 | mark_all_ce_unused(o->src_index); |
026680f8 | 1766 | ret = unpack_failed(o, NULL); |
b4194828 JH |
1767 | if (o->exiting_early) |
1768 | ret = 0; | |
026680f8 | 1769 | goto done; |
16da134b | 1770 | } |
076b0adc | 1771 | |
7af7a258 EN |
1772 | /* |
1773 | * Update SKIP_WORKTREE bits according to sparsity patterns, and update | |
1774 | * working directory to match. | |
1775 | * | |
1776 | * CE_NEW_SKIP_WORKTREE is used internally. | |
1777 | */ | |
1778 | enum update_sparsity_result update_sparsity(struct unpack_trees_options *o) | |
1779 | { | |
1780 | enum update_sparsity_result ret = UPDATE_SPARSITY_SUCCESS; | |
1781 | struct pattern_list pl; | |
1782 | int i, empty_worktree; | |
1783 | unsigned old_show_all_errors; | |
1784 | int free_pattern_list = 0; | |
1785 | ||
1786 | old_show_all_errors = o->show_all_errors; | |
1787 | o->show_all_errors = 1; | |
1788 | ||
1789 | /* Sanity checks */ | |
1790 | if (!o->update || o->index_only || o->skip_sparse_checkout) | |
1791 | BUG("update_sparsity() is for reflecting sparsity patterns in working directory"); | |
1792 | if (o->src_index != o->dst_index || o->fn) | |
1793 | BUG("update_sparsity() called wrong"); | |
1794 | ||
1795 | trace_performance_enter(); | |
1796 | ||
1797 | /* If we weren't given patterns, use the recorded ones */ | |
1798 | if (!o->pl) { | |
1799 | memset(&pl, 0, sizeof(pl)); | |
1800 | free_pattern_list = 1; | |
1801 | populate_from_existing_patterns(o, &pl); | |
1802 | if (o->skip_sparse_checkout) | |
1803 | goto skip_sparse_checkout; | |
1804 | } | |
1805 | ||
1806 | /* Set NEW_SKIP_WORKTREE on existing entries. */ | |
1807 | mark_all_ce_unused(o->src_index); | |
1808 | mark_new_skip_worktree(o->pl, o->src_index, 0, | |
1809 | CE_NEW_SKIP_WORKTREE, o->verbose_update); | |
1810 | ||
1811 | /* Then loop over entries and update/remove as needed */ | |
1812 | ret = UPDATE_SPARSITY_SUCCESS; | |
1813 | empty_worktree = 1; | |
1814 | for (i = 0; i < o->src_index->cache_nr; i++) { | |
1815 | struct cache_entry *ce = o->src_index->cache[i]; | |
1816 | ||
ebb568b9 EN |
1817 | |
1818 | if (ce_stage(ce)) { | |
1819 | /* -1 because for loop will increment by 1 */ | |
1820 | i += warn_conflicted_path(o->src_index, i, o) - 1; | |
1821 | ret = UPDATE_SPARSITY_WARNINGS; | |
1822 | continue; | |
1823 | } | |
1824 | ||
7af7a258 EN |
1825 | if (apply_sparse_checkout(o->src_index, ce, o)) |
1826 | ret = UPDATE_SPARSITY_WARNINGS; | |
1827 | ||
1828 | if (!ce_skip_worktree(ce)) | |
1829 | empty_worktree = 0; | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * Sparse checkout is meant to narrow down checkout area | |
1834 | * but it does not make sense to narrow down to empty working | |
1835 | * tree. This is usually a mistake in sparse checkout rules. | |
1836 | * Do not allow users to do that. | |
1837 | */ | |
1838 | if (o->src_index->cache_nr && empty_worktree) { | |
1839 | unpack_failed(o, "Sparse checkout leaves no entry on working directory"); | |
1840 | ret = UPDATE_SPARSITY_INDEX_UPDATE_FAILURES; | |
1841 | goto done; | |
1842 | } | |
1843 | ||
1844 | skip_sparse_checkout: | |
1845 | if (check_updates(o, o->src_index)) | |
1846 | ret = UPDATE_SPARSITY_WORKTREE_UPDATE_FAILURES; | |
1847 | ||
1848 | done: | |
6271d77c | 1849 | display_warning_msgs(o); |
7af7a258 EN |
1850 | o->show_all_errors = old_show_all_errors; |
1851 | if (free_pattern_list) | |
1852 | clear_pattern_list(&pl); | |
1853 | trace_performance_leave("update_sparsity"); | |
1854 | return ret; | |
1855 | } | |
1856 | ||
076b0adc JS |
1857 | /* Here come the merge functions */ |
1858 | ||
eb9ae4b5 RS |
1859 | static int reject_merge(const struct cache_entry *ce, |
1860 | struct unpack_trees_options *o) | |
076b0adc | 1861 | { |
191e9d2c | 1862 | return add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name); |
076b0adc JS |
1863 | } |
1864 | ||
eb9ae4b5 | 1865 | static int same(const struct cache_entry *a, const struct cache_entry *b) |
076b0adc JS |
1866 | { |
1867 | if (!!a != !!b) | |
1868 | return 0; | |
1869 | if (!a && !b) | |
1870 | return 1; | |
e11d7b59 JH |
1871 | if ((a->ce_flags | b->ce_flags) & CE_CONFLICTED) |
1872 | return 0; | |
076b0adc | 1873 | return a->ce_mode == b->ce_mode && |
4a7e27e9 | 1874 | oideq(&a->oid, &b->oid); |
076b0adc JS |
1875 | } |
1876 | ||
1877 | ||
1878 | /* | |
1879 | * When a CE gets turned into an unmerged entry, we | |
1880 | * want it to be up-to-date | |
1881 | */ | |
eb9ae4b5 RS |
1882 | static int verify_uptodate_1(const struct cache_entry *ce, |
1883 | struct unpack_trees_options *o, | |
1884 | enum unpack_trees_error_types error_type) | |
076b0adc JS |
1885 | { |
1886 | struct stat st; | |
1887 | ||
d5b66299 NTND |
1888 | if (o->index_only) |
1889 | return 0; | |
1890 | ||
1891 | /* | |
1892 | * CE_VALID and CE_SKIP_WORKTREE cheat, we better check again | |
1893 | * if this entry is truly up-to-date because this file may be | |
1894 | * overwritten. | |
1895 | */ | |
1896 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) | |
1897 | ; /* keep checking */ | |
1898 | else if (o->reset || ce_uptodate(ce)) | |
203a2fe1 | 1899 | return 0; |
076b0adc JS |
1900 | |
1901 | if (!lstat(ce->name, &st)) { | |
d5b66299 NTND |
1902 | int flags = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE; |
1903 | unsigned changed = ie_match_stat(o->src_index, ce, &st, flags); | |
a7bc845a SB |
1904 | |
1905 | if (submodule_from_ce(ce)) { | |
1906 | int r = check_submodule_move_head(ce, | |
1907 | "HEAD", oid_to_hex(&ce->oid), o); | |
1908 | if (r) | |
191e9d2c | 1909 | return add_rejected_path(o, error_type, ce->name); |
a7bc845a SB |
1910 | return 0; |
1911 | } | |
1912 | ||
076b0adc | 1913 | if (!changed) |
203a2fe1 | 1914 | return 0; |
936492d3 | 1915 | /* |
a7bc845a SB |
1916 | * Historic default policy was to allow submodule to be out |
1917 | * of sync wrt the superproject index. If the submodule was | |
1918 | * not considered interesting above, we don't care here. | |
936492d3 | 1919 | */ |
7a51ed66 | 1920 | if (S_ISGITLINK(ce->ce_mode)) |
203a2fe1 | 1921 | return 0; |
a7bc845a | 1922 | |
076b0adc JS |
1923 | errno = 0; |
1924 | } | |
076b0adc | 1925 | if (errno == ENOENT) |
203a2fe1 | 1926 | return 0; |
191e9d2c | 1927 | return add_rejected_path(o, error_type, ce->name); |
35a5aa79 NTND |
1928 | } |
1929 | ||
64b1abe9 EN |
1930 | int verify_uptodate(const struct cache_entry *ce, |
1931 | struct unpack_trees_options *o) | |
35a5aa79 | 1932 | { |
2431afbf | 1933 | if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) |
f1f523ea | 1934 | return 0; |
08402b04 | 1935 | return verify_uptodate_1(ce, o, ERROR_NOT_UPTODATE_FILE); |
076b0adc JS |
1936 | } |
1937 | ||
eb9ae4b5 | 1938 | static int verify_uptodate_sparse(const struct cache_entry *ce, |
e800ec9d NTND |
1939 | struct unpack_trees_options *o) |
1940 | { | |
1ac83f42 | 1941 | return verify_uptodate_1(ce, o, WARNING_SPARSE_NOT_UPTODATE_FILE); |
076b0adc JS |
1942 | } |
1943 | ||
383480ba NTND |
1944 | /* |
1945 | * TODO: We should actually invalidate o->result, not src_index [1]. | |
1946 | * But since cache tree and untracked cache both are not copied to | |
1947 | * o->result until unpacking is complete, we invalidate them on | |
1948 | * src_index instead with the assumption that they will be copied to | |
1949 | * dst_index at the end. | |
1950 | * | |
1951 | * [1] src_index->cache_tree is also used in unpack_callback() so if | |
1952 | * we invalidate o->result, we need to update it to use | |
1953 | * o->result.cache_tree as well. | |
1954 | */ | |
eb9ae4b5 RS |
1955 | static void invalidate_ce_path(const struct cache_entry *ce, |
1956 | struct unpack_trees_options *o) | |
076b0adc | 1957 | { |
e931371a NTND |
1958 | if (!ce) |
1959 | return; | |
1960 | cache_tree_invalidate_path(o->src_index, ce->name); | |
0cacebf0 | 1961 | untracked_cache_invalidate_path(o->src_index, ce->name, 1); |
076b0adc JS |
1962 | } |
1963 | ||
0cf73755 SV |
1964 | /* |
1965 | * Check that checking out ce->sha1 in subdir ce->name is not | |
1966 | * going to overwrite any working files. | |
0cf73755 | 1967 | */ |
d6b12300 SB |
1968 | static int verify_clean_submodule(const char *old_sha1, |
1969 | const struct cache_entry *ce, | |
eb9ae4b5 | 1970 | struct unpack_trees_options *o) |
0cf73755 | 1971 | { |
a7bc845a SB |
1972 | if (!submodule_from_ce(ce)) |
1973 | return 0; | |
1974 | ||
1975 | return check_submodule_move_head(ce, old_sha1, | |
1976 | oid_to_hex(&ce->oid), o); | |
0cf73755 SV |
1977 | } |
1978 | ||
eb9ae4b5 | 1979 | static int verify_clean_subdirectory(const struct cache_entry *ce, |
eb9ae4b5 | 1980 | struct unpack_trees_options *o) |
c8193534 JH |
1981 | { |
1982 | /* | |
0cf73755 | 1983 | * we are about to extract "ce->name"; we would not want to lose |
c8193534 JH |
1984 | * anything in the existing directory there. |
1985 | */ | |
1986 | int namelen; | |
7b9e3ce0 | 1987 | int i; |
c8193534 JH |
1988 | struct dir_struct d; |
1989 | char *pathbuf; | |
1990 | int cnt = 0; | |
0cf73755 | 1991 | |
d6b12300 | 1992 | if (S_ISGITLINK(ce->ce_mode)) { |
1053fe82 | 1993 | struct object_id oid; |
a98e6101 | 1994 | int sub_head = resolve_gitlink_ref(ce->name, "HEAD", &oid); |
d6b12300 SB |
1995 | /* |
1996 | * If we are not going to update the submodule, then | |
0cf73755 SV |
1997 | * we don't care. |
1998 | */ | |
4a7e27e9 | 1999 | if (!sub_head && oideq(&oid, &ce->oid)) |
0cf73755 | 2000 | return 0; |
1053fe82 | 2001 | return verify_clean_submodule(sub_head ? NULL : oid_to_hex(&oid), |
df351c6e | 2002 | ce, o); |
0cf73755 | 2003 | } |
c8193534 JH |
2004 | |
2005 | /* | |
2006 | * First let's make sure we do not have a local modification | |
2007 | * in that directory. | |
2008 | */ | |
68c4f6a5 | 2009 | namelen = ce_namelen(ce); |
da165f47 JH |
2010 | for (i = locate_in_src_index(ce, o); |
2011 | i < o->src_index->cache_nr; | |
2012 | i++) { | |
837e5fe9 CB |
2013 | struct cache_entry *ce2 = o->src_index->cache[i]; |
2014 | int len = ce_namelen(ce2); | |
c8193534 | 2015 | if (len < namelen || |
837e5fe9 CB |
2016 | strncmp(ce->name, ce2->name, namelen) || |
2017 | ce2->name[namelen] != '/') | |
c8193534 JH |
2018 | break; |
2019 | /* | |
da165f47 JH |
2020 | * ce2->name is an entry in the subdirectory to be |
2021 | * removed. | |
c8193534 | 2022 | */ |
837e5fe9 CB |
2023 | if (!ce_stage(ce2)) { |
2024 | if (verify_uptodate(ce2, o)) | |
203a2fe1 | 2025 | return -1; |
837e5fe9 | 2026 | add_entry(o, ce2, CE_REMOVE, 0); |
5697ca9a | 2027 | invalidate_ce_path(ce, o); |
da165f47 | 2028 | mark_ce_used(ce2, o); |
c8193534 JH |
2029 | } |
2030 | cnt++; | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | * Then we need to make sure that we do not lose a locally | |
2035 | * present file that is not ignored. | |
2036 | */ | |
75faa45a | 2037 | pathbuf = xstrfmt("%.*s/", namelen, ce->name); |
c8193534 JH |
2038 | |
2039 | memset(&d, 0, sizeof(d)); | |
2040 | if (o->dir) | |
2041 | d.exclude_per_dir = o->dir->exclude_per_dir; | |
c7f3259d | 2042 | i = read_directory(&d, o->src_index, pathbuf, namelen+1, NULL); |
c8193534 | 2043 | if (i) |
191e9d2c | 2044 | return add_rejected_path(o, ERROR_NOT_UPTODATE_DIR, ce->name); |
c8193534 JH |
2045 | free(pathbuf); |
2046 | return cnt; | |
2047 | } | |
2048 | ||
32260ad5 LT |
2049 | /* |
2050 | * This gets called when there was no index entry for the tree entry 'dst', | |
2051 | * but we found a file in the working tree that 'lstat()' said was fine, | |
2052 | * and we're on a case-insensitive filesystem. | |
2053 | * | |
2054 | * See if we can find a case-insensitive match in the index that also | |
2055 | * matches the stat information, and assume it's that other file! | |
2056 | */ | |
a9307f5a | 2057 | static int icase_exists(struct unpack_trees_options *o, const char *name, int len, struct stat *st) |
32260ad5 | 2058 | { |
9c5e6c80 | 2059 | const struct cache_entry *src; |
32260ad5 | 2060 | |
ebbd7439 | 2061 | src = index_file_exists(o->src_index, name, len, 1); |
56cac48c | 2062 | return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
32260ad5 LT |
2063 | } |
2064 | ||
a9307f5a | 2065 | static int check_ok_to_remove(const char *name, int len, int dtype, |
eb9ae4b5 | 2066 | const struct cache_entry *ce, struct stat *st, |
a9307f5a CB |
2067 | enum unpack_trees_error_types error_type, |
2068 | struct unpack_trees_options *o) | |
2069 | { | |
9c5e6c80 | 2070 | const struct cache_entry *result; |
a9307f5a CB |
2071 | |
2072 | /* | |
2073 | * It may be that the 'lstat()' succeeded even though | |
2074 | * target 'ce' was absent, because there is an old | |
2075 | * entry that is different only in case.. | |
2076 | * | |
2077 | * Ignore that lstat() if it matches. | |
2078 | */ | |
2079 | if (ignore_case && icase_exists(o, name, len, st)) | |
2080 | return 0; | |
2081 | ||
589570db | 2082 | if (o->dir && |
c7f3259d | 2083 | is_excluded(o->dir, o->src_index, name, &dtype)) |
a9307f5a CB |
2084 | /* |
2085 | * ce->name is explicitly excluded, so it is Ok to | |
2086 | * overwrite it. | |
2087 | */ | |
2088 | return 0; | |
2089 | if (S_ISDIR(st->st_mode)) { | |
2090 | /* | |
2091 | * We are checking out path "foo" and | |
2092 | * found "foo/." in the working tree. | |
2093 | * This is tricky -- if we have modified | |
2094 | * files that are in "foo/" we would lose | |
2095 | * them. | |
2096 | */ | |
df351c6e | 2097 | if (verify_clean_subdirectory(ce, o) < 0) |
a9307f5a CB |
2098 | return -1; |
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | /* | |
2103 | * The previous round may already have decided to | |
2104 | * delete this path, which is in a subdirectory that | |
2105 | * is being replaced with a blob. | |
2106 | */ | |
ebbd7439 | 2107 | result = index_file_exists(&o->result, name, len, 0); |
a9307f5a CB |
2108 | if (result) { |
2109 | if (result->ce_flags & CE_REMOVE) | |
2110 | return 0; | |
2111 | } | |
2112 | ||
191e9d2c | 2113 | return add_rejected_path(o, error_type, name); |
a9307f5a CB |
2114 | } |
2115 | ||
076b0adc JS |
2116 | /* |
2117 | * We do not want to remove or overwrite a working tree file that | |
f8a9d428 | 2118 | * is not tracked, unless it is ignored. |
076b0adc | 2119 | */ |
eb9ae4b5 RS |
2120 | static int verify_absent_1(const struct cache_entry *ce, |
2121 | enum unpack_trees_error_types error_type, | |
2122 | struct unpack_trees_options *o) | |
076b0adc | 2123 | { |
f66caaf9 | 2124 | int len; |
076b0adc JS |
2125 | struct stat st; |
2126 | ||
2127 | if (o->index_only || o->reset || !o->update) | |
203a2fe1 | 2128 | return 0; |
c8193534 | 2129 | |
f66caaf9 CB |
2130 | len = check_leading_path(ce->name, ce_namelen(ce)); |
2131 | if (!len) | |
203a2fe1 | 2132 | return 0; |
f66caaf9 | 2133 | else if (len > 0) { |
f514ef97 JK |
2134 | char *path; |
2135 | int ret; | |
2136 | ||
2137 | path = xmemdupz(ce->name, len); | |
a93e5301 | 2138 | if (lstat(path, &st)) |
43c728e2 | 2139 | ret = error_errno("cannot stat '%s'", path); |
a7bc845a SB |
2140 | else { |
2141 | if (submodule_from_ce(ce)) | |
2142 | ret = check_submodule_move_head(ce, | |
2143 | oid_to_hex(&ce->oid), | |
2144 | NULL, o); | |
2145 | else | |
2146 | ret = check_ok_to_remove(path, len, DT_UNKNOWN, NULL, | |
2147 | &st, error_type, o); | |
2148 | } | |
f514ef97 JK |
2149 | free(path); |
2150 | return ret; | |
92fda79e JN |
2151 | } else if (lstat(ce->name, &st)) { |
2152 | if (errno != ENOENT) | |
43c728e2 | 2153 | return error_errno("cannot stat '%s'", ce->name); |
92fda79e JN |
2154 | return 0; |
2155 | } else { | |
a7bc845a SB |
2156 | if (submodule_from_ce(ce)) |
2157 | return check_submodule_move_head(ce, oid_to_hex(&ce->oid), | |
2158 | NULL, o); | |
2159 | ||
a9307f5a | 2160 | return check_ok_to_remove(ce->name, ce_namelen(ce), |
92fda79e JN |
2161 | ce_to_dtype(ce), ce, &st, |
2162 | error_type, o); | |
2163 | } | |
076b0adc | 2164 | } |
a9307f5a | 2165 | |
eb9ae4b5 | 2166 | static int verify_absent(const struct cache_entry *ce, |
08402b04 | 2167 | enum unpack_trees_error_types error_type, |
35a5aa79 NTND |
2168 | struct unpack_trees_options *o) |
2169 | { | |
2431afbf | 2170 | if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) |
f1f523ea | 2171 | return 0; |
08402b04 | 2172 | return verify_absent_1(ce, error_type, o); |
35a5aa79 | 2173 | } |
076b0adc | 2174 | |
eb9ae4b5 RS |
2175 | static int verify_absent_sparse(const struct cache_entry *ce, |
2176 | enum unpack_trees_error_types error_type, | |
2177 | struct unpack_trees_options *o) | |
e800ec9d | 2178 | { |
d61633ae | 2179 | return verify_absent_1(ce, error_type, o); |
e800ec9d | 2180 | } |
076b0adc | 2181 | |
f2fa3542 | 2182 | static int merged_entry(const struct cache_entry *ce, |
eb9ae4b5 | 2183 | const struct cache_entry *old, |
f2fa3542 | 2184 | struct unpack_trees_options *o) |
076b0adc | 2185 | { |
7f8ab8dc | 2186 | int update = CE_UPDATE; |
8e72d675 | 2187 | struct cache_entry *merge = dup_cache_entry(ce, &o->result); |
7f8ab8dc | 2188 | |
e11d7b59 | 2189 | if (!old) { |
2431afbf NTND |
2190 | /* |
2191 | * New index entries. In sparse checkout, the following | |
2192 | * verify_absent() will be delayed until after | |
2193 | * traverse_trees() finishes in unpack_trees(), then: | |
2194 | * | |
2195 | * - CE_NEW_SKIP_WORKTREE will be computed correctly | |
2196 | * - verify_absent() be called again, this time with | |
2197 | * correct CE_NEW_SKIP_WORKTREE | |
2198 | * | |
2199 | * verify_absent() call here does nothing in sparse | |
2200 | * checkout (i.e. o->skip_sparse_checkout == 0) | |
2201 | */ | |
2202 | update |= CE_ADDED; | |
2203 | merge->ce_flags |= CE_NEW_SKIP_WORKTREE; | |
2204 | ||
f2fa3542 RS |
2205 | if (verify_absent(merge, |
2206 | ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) { | |
a849735b | 2207 | discard_cache_entry(merge); |
e11d7b59 | 2208 | return -1; |
f2fa3542 | 2209 | } |
e11d7b59 | 2210 | invalidate_ce_path(merge, o); |
a7bc845a | 2211 | |
e84704f1 | 2212 | if (submodule_from_ce(ce) && file_exists(ce->name)) { |
a7bc845a SB |
2213 | int ret = check_submodule_move_head(ce, NULL, |
2214 | oid_to_hex(&ce->oid), | |
2215 | o); | |
2216 | if (ret) | |
2217 | return ret; | |
2218 | } | |
2219 | ||
e11d7b59 | 2220 | } else if (!(old->ce_flags & CE_CONFLICTED)) { |
076b0adc JS |
2221 | /* |
2222 | * See if we can re-use the old CE directly? | |
2223 | * That way we get the uptodate stat info. | |
2224 | * | |
7f8ab8dc LT |
2225 | * This also removes the UPDATE flag on a match; otherwise |
2226 | * we will end up overwriting local changes in the work tree. | |
076b0adc JS |
2227 | */ |
2228 | if (same(old, merge)) { | |
eb7a2f1d | 2229 | copy_cache_entry(merge, old); |
7f8ab8dc | 2230 | update = 0; |
076b0adc | 2231 | } else { |
f2fa3542 | 2232 | if (verify_uptodate(old, o)) { |
a849735b | 2233 | discard_cache_entry(merge); |
203a2fe1 | 2234 | return -1; |
f2fa3542 | 2235 | } |
2431afbf NTND |
2236 | /* Migrate old flags over */ |
2237 | update |= old->ce_flags & (CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE); | |
bc052d7f | 2238 | invalidate_ce_path(old, o); |
076b0adc | 2239 | } |
a7bc845a | 2240 | |
e84704f1 | 2241 | if (submodule_from_ce(ce) && file_exists(ce->name)) { |
a7bc845a SB |
2242 | int ret = check_submodule_move_head(ce, oid_to_hex(&old->oid), |
2243 | oid_to_hex(&ce->oid), | |
2244 | o); | |
2245 | if (ret) | |
2246 | return ret; | |
2247 | } | |
e11d7b59 JH |
2248 | } else { |
2249 | /* | |
2250 | * Previously unmerged entry left as an existence | |
2251 | * marker by read_index_unmerged(); | |
2252 | */ | |
2253 | invalidate_ce_path(old, o); | |
076b0adc JS |
2254 | } |
2255 | ||
cc756edd JS |
2256 | if (do_add_entry(o, merge, update, CE_STAGEMASK) < 0) |
2257 | return -1; | |
076b0adc JS |
2258 | return 1; |
2259 | } | |
2260 | ||
eb9ae4b5 RS |
2261 | static int deleted_entry(const struct cache_entry *ce, |
2262 | const struct cache_entry *old, | |
2263 | struct unpack_trees_options *o) | |
076b0adc | 2264 | { |
34110cd4 LT |
2265 | /* Did it exist in the index? */ |
2266 | if (!old) { | |
08402b04 | 2267 | if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o)) |
203a2fe1 | 2268 | return -1; |
34110cd4 LT |
2269 | return 0; |
2270 | } | |
e11d7b59 | 2271 | if (!(old->ce_flags & CE_CONFLICTED) && verify_uptodate(old, o)) |
34110cd4 LT |
2272 | return -1; |
2273 | add_entry(o, ce, CE_REMOVE, 0); | |
bc052d7f | 2274 | invalidate_ce_path(ce, o); |
076b0adc JS |
2275 | return 1; |
2276 | } | |
2277 | ||
eb9ae4b5 RS |
2278 | static int keep_entry(const struct cache_entry *ce, |
2279 | struct unpack_trees_options *o) | |
076b0adc | 2280 | { |
34110cd4 | 2281 | add_entry(o, ce, 0, 0); |
5697ca9a NTND |
2282 | if (ce_stage(ce)) |
2283 | invalidate_ce_path(ce, o); | |
076b0adc JS |
2284 | return 1; |
2285 | } | |
2286 | ||
2287 | #if DBRT_DEBUG | |
2288 | static void show_stage_entry(FILE *o, | |
2289 | const char *label, const struct cache_entry *ce) | |
2290 | { | |
2291 | if (!ce) | |
2292 | fprintf(o, "%s (missing)\n", label); | |
2293 | else | |
2294 | fprintf(o, "%s%06o %s %d\t%s\n", | |
2295 | label, | |
7a51ed66 | 2296 | ce->ce_mode, |
99d1a986 | 2297 | oid_to_hex(&ce->oid), |
076b0adc JS |
2298 | ce_stage(ce), |
2299 | ce->name); | |
2300 | } | |
2301 | #endif | |
2302 | ||
5828e835 RS |
2303 | int threeway_merge(const struct cache_entry * const *stages, |
2304 | struct unpack_trees_options *o) | |
076b0adc | 2305 | { |
eb9ae4b5 RS |
2306 | const struct cache_entry *index; |
2307 | const struct cache_entry *head; | |
2308 | const struct cache_entry *remote = stages[o->head_idx + 1]; | |
076b0adc JS |
2309 | int count; |
2310 | int head_match = 0; | |
2311 | int remote_match = 0; | |
076b0adc JS |
2312 | |
2313 | int df_conflict_head = 0; | |
2314 | int df_conflict_remote = 0; | |
2315 | ||
2316 | int any_anc_missing = 0; | |
2317 | int no_anc_exists = 1; | |
2318 | int i; | |
2319 | ||
2320 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 2321 | if (!stages[i] || stages[i] == o->df_conflict_entry) |
076b0adc | 2322 | any_anc_missing = 1; |
4c4caafc | 2323 | else |
076b0adc | 2324 | no_anc_exists = 0; |
076b0adc JS |
2325 | } |
2326 | ||
2327 | index = stages[0]; | |
2328 | head = stages[o->head_idx]; | |
2329 | ||
2330 | if (head == o->df_conflict_entry) { | |
2331 | df_conflict_head = 1; | |
2332 | head = NULL; | |
2333 | } | |
2334 | ||
2335 | if (remote == o->df_conflict_entry) { | |
2336 | df_conflict_remote = 1; | |
2337 | remote = NULL; | |
2338 | } | |
2339 | ||
cee2d6ae JH |
2340 | /* |
2341 | * First, if there's a #16 situation, note that to prevent #13 | |
076b0adc JS |
2342 | * and #14. |
2343 | */ | |
2344 | if (!same(remote, head)) { | |
2345 | for (i = 1; i < o->head_idx; i++) { | |
2346 | if (same(stages[i], head)) { | |
2347 | head_match = i; | |
2348 | } | |
2349 | if (same(stages[i], remote)) { | |
2350 | remote_match = i; | |
2351 | } | |
2352 | } | |
2353 | } | |
2354 | ||
cee2d6ae JH |
2355 | /* |
2356 | * We start with cases where the index is allowed to match | |
076b0adc JS |
2357 | * something other than the head: #14(ALT) and #2ALT, where it |
2358 | * is permitted to match the result instead. | |
2359 | */ | |
2360 | /* #14, #14ALT, #2ALT */ | |
2361 | if (remote && !df_conflict_head && head_match && !remote_match) { | |
2362 | if (index && !same(index, remote) && !same(index, head)) | |
6a143aa2 | 2363 | return reject_merge(index, o); |
076b0adc JS |
2364 | return merged_entry(remote, index, o); |
2365 | } | |
2366 | /* | |
2367 | * If we have an entry in the index cache, then we want to | |
2368 | * make sure that it matches head. | |
2369 | */ | |
4e7c4571 | 2370 | if (index && !same(index, head)) |
6a143aa2 | 2371 | return reject_merge(index, o); |
076b0adc JS |
2372 | |
2373 | if (head) { | |
2374 | /* #5ALT, #15 */ | |
2375 | if (same(head, remote)) | |
2376 | return merged_entry(head, index, o); | |
2377 | /* #13, #3ALT */ | |
2378 | if (!df_conflict_remote && remote_match && !head_match) | |
2379 | return merged_entry(head, index, o); | |
2380 | } | |
2381 | ||
2382 | /* #1 */ | |
34110cd4 | 2383 | if (!head && !remote && any_anc_missing) |
076b0adc JS |
2384 | return 0; |
2385 | ||
cee2d6ae JH |
2386 | /* |
2387 | * Under the "aggressive" rule, we resolve mostly trivial | |
076b0adc JS |
2388 | * cases that we historically had git-merge-one-file resolve. |
2389 | */ | |
2390 | if (o->aggressive) { | |
cee2d6ae JH |
2391 | int head_deleted = !head; |
2392 | int remote_deleted = !remote; | |
eb9ae4b5 | 2393 | const struct cache_entry *ce = NULL; |
4c4caafc JH |
2394 | |
2395 | if (index) | |
0cf73755 | 2396 | ce = index; |
4c4caafc | 2397 | else if (head) |
0cf73755 | 2398 | ce = head; |
4c4caafc | 2399 | else if (remote) |
0cf73755 | 2400 | ce = remote; |
4c4caafc JH |
2401 | else { |
2402 | for (i = 1; i < o->head_idx; i++) { | |
2403 | if (stages[i] && stages[i] != o->df_conflict_entry) { | |
0cf73755 | 2404 | ce = stages[i]; |
4c4caafc JH |
2405 | break; |
2406 | } | |
2407 | } | |
2408 | } | |
2409 | ||
076b0adc JS |
2410 | /* |
2411 | * Deleted in both. | |
2412 | * Deleted in one and unchanged in the other. | |
2413 | */ | |
2414 | if ((head_deleted && remote_deleted) || | |
2415 | (head_deleted && remote && remote_match) || | |
2416 | (remote_deleted && head && head_match)) { | |
2417 | if (index) | |
2418 | return deleted_entry(index, index, o); | |
34110cd4 | 2419 | if (ce && !head_deleted) { |
08402b04 | 2420 | if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o)) |
203a2fe1 DB |
2421 | return -1; |
2422 | } | |
076b0adc JS |
2423 | return 0; |
2424 | } | |
2425 | /* | |
2426 | * Added in both, identically. | |
2427 | */ | |
2428 | if (no_anc_exists && head && remote && same(head, remote)) | |
2429 | return merged_entry(head, index, o); | |
2430 | ||
2431 | } | |
2432 | ||
2433 | /* Below are "no merge" cases, which require that the index be | |
2434 | * up-to-date to avoid the files getting overwritten with | |
2435 | * conflict resolution files. | |
2436 | */ | |
2437 | if (index) { | |
203a2fe1 DB |
2438 | if (verify_uptodate(index, o)) |
2439 | return -1; | |
076b0adc | 2440 | } |
076b0adc JS |
2441 | |
2442 | o->nontrivial_merge = 1; | |
2443 | ||
ea4b52a8 | 2444 | /* #2, #3, #4, #6, #7, #9, #10, #11. */ |
076b0adc JS |
2445 | count = 0; |
2446 | if (!head_match || !remote_match) { | |
2447 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 2448 | if (stages[i] && stages[i] != o->df_conflict_entry) { |
7f7932ab | 2449 | keep_entry(stages[i], o); |
076b0adc JS |
2450 | count++; |
2451 | break; | |
2452 | } | |
2453 | } | |
2454 | } | |
2455 | #if DBRT_DEBUG | |
2456 | else { | |
2457 | fprintf(stderr, "read-tree: warning #16 detected\n"); | |
2458 | show_stage_entry(stderr, "head ", stages[head_match]); | |
2459 | show_stage_entry(stderr, "remote ", stages[remote_match]); | |
2460 | } | |
2461 | #endif | |
7f7932ab JH |
2462 | if (head) { count += keep_entry(head, o); } |
2463 | if (remote) { count += keep_entry(remote, o); } | |
076b0adc JS |
2464 | return count; |
2465 | } | |
2466 | ||
2467 | /* | |
2468 | * Two-way merge. | |
2469 | * | |
2470 | * The rule is to "carry forward" what is in the index without losing | |
a75d7b54 | 2471 | * information across a "fast-forward", favoring a successful merge |
076b0adc JS |
2472 | * over a merge failure when it makes sense. For details of the |
2473 | * "carry forward" rule, please see <Documentation/git-read-tree.txt>. | |
2474 | * | |
2475 | */ | |
5828e835 RS |
2476 | int twoway_merge(const struct cache_entry * const *src, |
2477 | struct unpack_trees_options *o) | |
076b0adc | 2478 | { |
eb9ae4b5 RS |
2479 | const struct cache_entry *current = src[0]; |
2480 | const struct cache_entry *oldtree = src[1]; | |
2481 | const struct cache_entry *newtree = src[2]; | |
076b0adc JS |
2482 | |
2483 | if (o->merge_size != 2) | |
2484 | return error("Cannot do a twoway merge of %d trees", | |
2485 | o->merge_size); | |
2486 | ||
b8ba1535 JH |
2487 | if (oldtree == o->df_conflict_entry) |
2488 | oldtree = NULL; | |
2489 | if (newtree == o->df_conflict_entry) | |
2490 | newtree = NULL; | |
2491 | ||
076b0adc | 2492 | if (current) { |
b018ff60 JK |
2493 | if (current->ce_flags & CE_CONFLICTED) { |
2494 | if (same(oldtree, newtree) || o->reset) { | |
2495 | if (!newtree) | |
2496 | return deleted_entry(current, current, o); | |
2497 | else | |
2498 | return merged_entry(newtree, current, o); | |
2499 | } | |
6a143aa2 | 2500 | return reject_merge(current, o); |
6c1db1b3 | 2501 | } else if ((!oldtree && !newtree) || /* 4 and 5 */ |
b018ff60 JK |
2502 | (!oldtree && newtree && |
2503 | same(current, newtree)) || /* 6 and 7 */ | |
2504 | (oldtree && newtree && | |
2505 | same(oldtree, newtree)) || /* 14 and 15 */ | |
2506 | (oldtree && newtree && | |
2507 | !same(oldtree, newtree) && /* 18 and 19 */ | |
2508 | same(current, newtree))) { | |
7f7932ab | 2509 | return keep_entry(current, o); |
6c1db1b3 | 2510 | } else if (oldtree && !newtree && same(current, oldtree)) { |
076b0adc JS |
2511 | /* 10 or 11 */ |
2512 | return deleted_entry(oldtree, current, o); | |
6c1db1b3 | 2513 | } else if (oldtree && newtree && |
076b0adc JS |
2514 | same(current, oldtree) && !same(current, newtree)) { |
2515 | /* 20 or 21 */ | |
2516 | return merged_entry(newtree, current, o); | |
6c1db1b3 | 2517 | } else |
6a143aa2 | 2518 | return reject_merge(current, o); |
076b0adc | 2519 | } |
55218834 JH |
2520 | else if (newtree) { |
2521 | if (oldtree && !o->initial_checkout) { | |
2522 | /* | |
2523 | * deletion of the path was staged; | |
2524 | */ | |
2525 | if (same(oldtree, newtree)) | |
2526 | return 1; | |
2527 | return reject_merge(oldtree, o); | |
2528 | } | |
076b0adc | 2529 | return merged_entry(newtree, current, o); |
55218834 | 2530 | } |
d699676d | 2531 | return deleted_entry(oldtree, current, o); |
076b0adc JS |
2532 | } |
2533 | ||
2534 | /* | |
2535 | * Bind merge. | |
2536 | * | |
2537 | * Keep the index entries at stage0, collapse stage1 but make sure | |
2538 | * stage0 does not have anything there. | |
2539 | */ | |
5828e835 RS |
2540 | int bind_merge(const struct cache_entry * const *src, |
2541 | struct unpack_trees_options *o) | |
076b0adc | 2542 | { |
eb9ae4b5 RS |
2543 | const struct cache_entry *old = src[0]; |
2544 | const struct cache_entry *a = src[1]; | |
076b0adc JS |
2545 | |
2546 | if (o->merge_size != 1) | |
82247e9b | 2547 | return error("Cannot do a bind merge of %d trees", |
076b0adc JS |
2548 | o->merge_size); |
2549 | if (a && old) | |
b165fac8 | 2550 | return o->quiet ? -1 : |
3d415425 SB |
2551 | error(ERRORMSG(o, ERROR_BIND_OVERLAP), |
2552 | super_prefixed(a->name), | |
2553 | super_prefixed(old->name)); | |
076b0adc | 2554 | if (!a) |
7f7932ab | 2555 | return keep_entry(old, o); |
076b0adc JS |
2556 | else |
2557 | return merged_entry(a, NULL, o); | |
2558 | } | |
2559 | ||
2560 | /* | |
2561 | * One-way merge. | |
2562 | * | |
2563 | * The rule is: | |
2564 | * - take the stat information from stage0, take the data from stage1 | |
2565 | */ | |
5828e835 RS |
2566 | int oneway_merge(const struct cache_entry * const *src, |
2567 | struct unpack_trees_options *o) | |
076b0adc | 2568 | { |
eb9ae4b5 RS |
2569 | const struct cache_entry *old = src[0]; |
2570 | const struct cache_entry *a = src[1]; | |
076b0adc JS |
2571 | |
2572 | if (o->merge_size != 1) | |
2573 | return error("Cannot do a oneway merge of %d trees", | |
2574 | o->merge_size); | |
2575 | ||
78d3b06e | 2576 | if (!a || a == o->df_conflict_entry) |
076b0adc | 2577 | return deleted_entry(old, old, o); |
34110cd4 | 2578 | |
076b0adc | 2579 | if (old && same(old, a)) { |
34110cd4 | 2580 | int update = 0; |
679f2f9f US |
2581 | if (o->reset && o->update && !ce_uptodate(old) && !ce_skip_worktree(old) && |
2582 | !(old->ce_flags & CE_FSMONITOR_VALID)) { | |
076b0adc JS |
2583 | struct stat st; |
2584 | if (lstat(old->name, &st) || | |
56cac48c | 2585 | ie_match_stat(o->src_index, old, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE)) |
34110cd4 | 2586 | update |= CE_UPDATE; |
076b0adc | 2587 | } |
ad17312e SB |
2588 | if (o->update && S_ISGITLINK(old->ce_mode) && |
2589 | should_update_submodules() && !verify_uptodate(old, o)) | |
2590 | update |= CE_UPDATE; | |
ab5af825 | 2591 | add_entry(o, old, update, CE_STAGEMASK); |
34110cd4 | 2592 | return 0; |
076b0adc JS |
2593 | } |
2594 | return merged_entry(a, old, o); | |
2595 | } |